20735703080

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{431}}^1\times {\mathrm{509}}^1$

素因数の和:1107

約数の個数: 128

約数和(自身を含む): 49968576000

約数和(自身を除く): 29232872920

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 139, 170, 278, 340, 431, 509, 556, 680, 695, 862, 1018, 1112, 1390, 1724, 2036, 2155, 2363, 2545, 2780, 3448, 4072, 4310, 4726, 5090, 5560, 7327, 8620, 8653, 9452, 10180, 11815, 14654, 17240, 17306, 18904, 20360, 23630, 29308, 34612, 36635, 43265, 47260, 58616, 59909, 69224, 70751, 73270, 86530, 94520, 119818, 141502, 146540, 173060, 219379, 239636, 283004, 293080, 299545, 346120, 353755, 438758, 479272, 566008, 599090, 707510, 877516, 1018453, 1096895, 1198180, 1202767, 1415020, 1755032, 2036906, 2193790, 2396360, 2405534, 2830040, 3729443, 4073812, 4387580, 4811068, 5092265, 6013835, 7458886, 8147624, 8775160, 9622136, 10184530, 12027670, 14917772, 18647215, 20369060, 24055340, 29835544, 30493681, 37294430, 40738120, 48110680, 60987362, 74588860, 121974724, 149177720, 152468405, 243949448, 304936810, 518392577, 609873620, 1036785154, 1219747240, 2073570308, 2591962885, 4147140616, 5183925770, 10367851540, 20735703080]

約数ペア:

[(1, 20735703080), (2, 10367851540), (4, 5183925770), (5, 4147140616), (8, 2591962885), (10, 2073570308), (17, 1219747240), (20, 1036785154), (34, 609873620), (40, 518392577), (68, 304936810), (85, 243949448), (136, 152468405), (139, 149177720), (170, 121974724), (278, 74588860), (340, 60987362), (431, 48110680), (509, 40738120), (556, 37294430), (680, 30493681), (695, 29835544), (862, 24055340), (1018, 20369060), (1112, 18647215), (1390, 14917772), (1724, 12027670), (2036, 10184530), (2155, 9622136), (2363, 8775160), (2545, 8147624), (2780, 7458886), (3448, 6013835), (4072, 5092265), (4310, 4811068), (4726, 4387580), (5090, 4073812), (5560, 3729443), (7327, 2830040), (8620, 2405534), (8653, 2396360), (9452, 2193790), (10180, 2036906), (11815, 1755032), (14654, 1415020), (17240, 1202767), (17306, 1198180), (18904, 1096895), (20360, 1018453), (23630, 877516), (29308, 707510), (34612, 599090), (36635, 566008), (43265, 479272), (47260, 438758), (58616, 353755), (59909, 346120), (69224, 299545), (70751, 293080), (73270, 283004), (86530, 239636), (94520, 219379), (119818, 173060), (141502, 146540)]