20789640

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1$

素因数の和:156

約数の個数: 192

約数和(自身を含む): 74131200

約数和(自身を除く): 53341560

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 17, 18, 20, 24, 30, 34, 36, 40, 43, 45, 51, 60, 68, 72, 79, 85, 86, 90, 102, 120, 129, 136, 153, 158, 170, 172, 180, 204, 215, 237, 255, 258, 306, 316, 340, 344, 360, 387, 395, 408, 430, 474, 510, 516, 612, 632, 645, 680, 711, 731, 765, 774, 790, 860, 948, 1020, 1032, 1185, 1224, 1290, 1343, 1422, 1462, 1530, 1548, 1580, 1720, 1896, 1935, 2040, 2193, 2370, 2580, 2686, 2844, 2924, 3060, 3096, 3160, 3397, 3555, 3655, 3870, 4029, 4386, 4740, 5160, 5372, 5688, 5848, 6120, 6579, 6715, 6794, 7110, 7310, 7740, 8058, 8772, 9480, 10191, 10744, 10965, 12087, 13158, 13430, 13588, 14220, 14620, 15480, 16116, 16985, 17544, 20145, 20382, 21930, 24174, 26316, 26860, 27176, 28440, 29240, 30573, 32232, 32895, 33970, 40290, 40764, 43860, 48348, 50955, 52632, 53720, 57749, 60435, 61146, 65790, 67940, 80580, 81528, 87720, 96696, 101910, 115498, 120870, 122292, 131580, 135880, 152865, 161160, 173247, 203820, 230996, 241740, 244584, 263160, 288745, 305730, 346494, 407640, 461992, 483480, 519741, 577490, 611460, 692988, 866235, 1039482, 1154980, 1222920, 1385976, 1732470, 2078964, 2309960, 2598705, 3464940, 4157928, 5197410, 6929880, 10394820, 20789640]

約数ペア:

[(1, 20789640), (2, 10394820), (3, 6929880), (4, 5197410), (5, 4157928), (6, 3464940), (8, 2598705), (9, 2309960), (10, 2078964), (12, 1732470), (15, 1385976), (17, 1222920), (18, 1154980), (20, 1039482), (24, 866235), (30, 692988), (34, 611460), (36, 577490), (40, 519741), (43, 483480), (45, 461992), (51, 407640), (60, 346494), (68, 305730), (72, 288745), (79, 263160), (85, 244584), (86, 241740), (90, 230996), (102, 203820), (120, 173247), (129, 161160), (136, 152865), (153, 135880), (158, 131580), (170, 122292), (172, 120870), (180, 115498), (204, 101910), (215, 96696), (237, 87720), (255, 81528), (258, 80580), (306, 67940), (316, 65790), (340, 61146), (344, 60435), (360, 57749), (387, 53720), (395, 52632), (408, 50955), (430, 48348), (474, 43860), (510, 40764), (516, 40290), (612, 33970), (632, 32895), (645, 32232), (680, 30573), (711, 29240), (731, 28440), (765, 27176), (774, 26860), (790, 26316), (860, 24174), (948, 21930), (1020, 20382), (1032, 20145), (1185, 17544), (1224, 16985), (1290, 16116), (1343, 15480), (1422, 14620), (1462, 14220), (1530, 13588), (1548, 13430), (1580, 13158), (1720, 12087), (1896, 10965), (1935, 10744), (2040, 10191), (2193, 9480), (2370, 8772), (2580, 8058), (2686, 7740), (2844, 7310), (2924, 7110), (3060, 6794), (3096, 6715), (3160, 6579), (3397, 6120), (3555, 5848), (3655, 5688), (3870, 5372), (4029, 5160), (4386, 4740)]