21961160

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{269}}^1$

素因数の和:450

約数の個数: 64

約数和(自身を含む): 53751600

約数和(自身を除く): 31790440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 157, 260, 269, 314, 520, 538, 628, 785, 1076, 1256, 1345, 1570, 2041, 2152, 2690, 3140, 3497, 4082, 5380, 6280, 6994, 8164, 10205, 10760, 13988, 16328, 17485, 20410, 27976, 34970, 40820, 42233, 69940, 81640, 84466, 139880, 168932, 211165, 337864, 422330, 549029, 844660, 1098058, 1689320, 2196116, 2745145, 4392232, 5490290, 10980580, 21961160]

約数ペア:

[(1, 21961160), (2, 10980580), (4, 5490290), (5, 4392232), (8, 2745145), (10, 2196116), (13, 1689320), (20, 1098058), (26, 844660), (40, 549029), (52, 422330), (65, 337864), (104, 211165), (130, 168932), (157, 139880), (260, 84466), (269, 81640), (314, 69940), (520, 42233), (538, 40820), (628, 34970), (785, 27976), (1076, 20410), (1256, 17485), (1345, 16328), (1570, 13988), (2041, 10760), (2152, 10205), (2690, 8164), (3140, 6994), (3497, 6280), (4082, 5380)]