21738860

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{691}}^1$

素因数の和:735

約数の個数: 72

約数和(自身を含む): 54117168

約数和(自身を除く): 32378308

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 121, 130, 143, 220, 242, 260, 286, 484, 572, 605, 691, 715, 1210, 1382, 1430, 1573, 2420, 2764, 2860, 3146, 3455, 6292, 6910, 7601, 7865, 8983, 13820, 15202, 15730, 17966, 30404, 31460, 35932, 38005, 44915, 76010, 83611, 89830, 98813, 152020, 167222, 179660, 197626, 334444, 395252, 418055, 494065, 836110, 988130, 1086943, 1672220, 1976260, 2173886, 4347772, 5434715, 10869430, 21738860]

約数ペア:

[(1, 21738860), (2, 10869430), (4, 5434715), (5, 4347772), (10, 2173886), (11, 1976260), (13, 1672220), (20, 1086943), (22, 988130), (26, 836110), (44, 494065), (52, 418055), (55, 395252), (65, 334444), (110, 197626), (121, 179660), (130, 167222), (143, 152020), (220, 98813), (242, 89830), (260, 83611), (286, 76010), (484, 44915), (572, 38005), (605, 35932), (691, 31460), (715, 30404), (1210, 17966), (1382, 15730), (1430, 15202), (1573, 13820), (2420, 8983), (2764, 7865), (2860, 7601), (3146, 6910), (3455, 6292)]