21902660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{1381}}^1$

素因数の和:1464

約数の個数: 48

約数和(自身を含む): 50382192

約数和(自身を除く): 28479532

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 61, 65, 122, 130, 244, 260, 305, 610, 793, 1220, 1381, 1586, 2762, 3172, 3965, 5524, 6905, 7930, 13810, 15860, 17953, 27620, 35906, 71812, 84241, 89765, 168482, 179530, 336964, 359060, 421205, 842410, 1095133, 1684820, 2190266, 4380532, 5475665, 10951330, 21902660]

約数ペア:

[(1, 21902660), (2, 10951330), (4, 5475665), (5, 4380532), (10, 2190266), (13, 1684820), (20, 1095133), (26, 842410), (52, 421205), (61, 359060), (65, 336964), (122, 179530), (130, 168482), (244, 89765), (260, 84241), (305, 71812), (610, 35906), (793, 27620), (1220, 17953), (1381, 15860), (1586, 13810), (2762, 7930), (3172, 6905), (3965, 5524)]