21651240

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{13879}}^1$

素因数の和:13906

約数の個数: 64

約数和(自身を含む): 69955200

約数和(自身を除く): 48303960

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 13879, 27758, 41637, 55516, 69395, 83274, 111032, 138790, 166548, 180427, 208185, 277580, 333096, 360854, 416370, 541281, 555160, 721708, 832740, 902135, 1082562, 1443416, 1665480, 1804270, 2165124, 2706405, 3608540, 4330248, 5412810, 7217080, 10825620, 21651240]

約数ペア:

[(1, 21651240), (2, 10825620), (3, 7217080), (4, 5412810), (5, 4330248), (6, 3608540), (8, 2706405), (10, 2165124), (12, 1804270), (13, 1665480), (15, 1443416), (20, 1082562), (24, 902135), (26, 832740), (30, 721708), (39, 555160), (40, 541281), (52, 416370), (60, 360854), (65, 333096), (78, 277580), (104, 208185), (120, 180427), (130, 166548), (156, 138790), (195, 111032), (260, 83274), (312, 69395), (390, 55516), (520, 41637), (780, 27758), (1560, 13879)]