20997720

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1$

素因数の和:154

約数の個数: 192

約数和(自身を含む): 74805120

約数和(自身を除く): 53807400

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 17, 18, 20, 24, 30, 34, 36, 40, 45, 47, 51, 60, 68, 72, 73, 85, 90, 94, 102, 120, 136, 141, 146, 153, 170, 180, 188, 204, 219, 235, 255, 282, 292, 306, 340, 360, 365, 376, 408, 423, 438, 470, 510, 564, 584, 612, 657, 680, 705, 730, 765, 799, 846, 876, 940, 1020, 1095, 1128, 1224, 1241, 1314, 1410, 1460, 1530, 1598, 1692, 1752, 1880, 2040, 2115, 2190, 2397, 2482, 2628, 2820, 2920, 3060, 3196, 3285, 3384, 3431, 3723, 3995, 4230, 4380, 4794, 4964, 5256, 5640, 6120, 6205, 6392, 6570, 6862, 7191, 7446, 7990, 8460, 8760, 9588, 9928, 10293, 11169, 11985, 12410, 13140, 13724, 14382, 14892, 15980, 16920, 17155, 18615, 19176, 20586, 22338, 23970, 24820, 26280, 27448, 28764, 29784, 30879, 31960, 34310, 35955, 37230, 41172, 44676, 47940, 49640, 51465, 55845, 57528, 58327, 61758, 68620, 71910, 74460, 82344, 89352, 95880, 102930, 111690, 116654, 123516, 137240, 143820, 148920, 154395, 174981, 205860, 223380, 233308, 247032, 287640, 291635, 308790, 349962, 411720, 446760, 466616, 524943, 583270, 617580, 699924, 874905, 1049886, 1166540, 1235160, 1399848, 1749810, 2099772, 2333080, 2624715, 3499620, 4199544, 5249430, 6999240, 10498860, 20997720]

約数ペア:

[(1, 20997720), (2, 10498860), (3, 6999240), (4, 5249430), (5, 4199544), (6, 3499620), (8, 2624715), (9, 2333080), (10, 2099772), (12, 1749810), (15, 1399848), (17, 1235160), (18, 1166540), (20, 1049886), (24, 874905), (30, 699924), (34, 617580), (36, 583270), (40, 524943), (45, 466616), (47, 446760), (51, 411720), (60, 349962), (68, 308790), (72, 291635), (73, 287640), (85, 247032), (90, 233308), (94, 223380), (102, 205860), (120, 174981), (136, 154395), (141, 148920), (146, 143820), (153, 137240), (170, 123516), (180, 116654), (188, 111690), (204, 102930), (219, 95880), (235, 89352), (255, 82344), (282, 74460), (292, 71910), (306, 68620), (340, 61758), (360, 58327), (365, 57528), (376, 55845), (408, 51465), (423, 49640), (438, 47940), (470, 44676), (510, 41172), (564, 37230), (584, 35955), (612, 34310), (657, 31960), (680, 30879), (705, 29784), (730, 28764), (765, 27448), (799, 26280), (846, 24820), (876, 23970), (940, 22338), (1020, 20586), (1095, 19176), (1128, 18615), (1224, 17155), (1241, 16920), (1314, 15980), (1410, 14892), (1460, 14382), (1530, 13724), (1598, 13140), (1692, 12410), (1752, 11985), (1880, 11169), (2040, 10293), (2115, 9928), (2190, 9588), (2397, 8760), (2482, 8460), (2628, 7990), (2820, 7446), (2920, 7191), (3060, 6862), (3196, 6570), (3285, 6392), (3384, 6205), (3431, 6120), (3723, 5640), (3995, 5256), (4230, 4964), (4380, 4794)]