21890336

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{521}}^1$

素因数の和:645

約数の個数: 48

約数和(自身を含む): 46961208

約数和(自身を除く): 25070872

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 101, 104, 202, 208, 404, 416, 521, 808, 1042, 1313, 1616, 2084, 2626, 3232, 4168, 5252, 6773, 8336, 10504, 13546, 16672, 21008, 27092, 42016, 52621, 54184, 105242, 108368, 210484, 216736, 420968, 684073, 841936, 1368146, 1683872, 2736292, 5472584, 10945168, 21890336]

約数ペア:

[(1, 21890336), (2, 10945168), (4, 5472584), (8, 2736292), (13, 1683872), (16, 1368146), (26, 841936), (32, 684073), (52, 420968), (101, 216736), (104, 210484), (202, 108368), (208, 105242), (404, 54184), (416, 52621), (521, 42016), (808, 27092), (1042, 21008), (1313, 16672), (1616, 13546), (2084, 10504), (2626, 8336), (3232, 6773), (4168, 5252)]