21965320

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{797}}^1$

素因数の和:874

約数の個数: 64

約数和(自身を含む): 54295920

約数和(自身を除く): 32330600

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 53, 65, 104, 106, 130, 212, 260, 265, 424, 520, 530, 689, 797, 1060, 1378, 1594, 2120, 2756, 3188, 3445, 3985, 5512, 6376, 6890, 7970, 10361, 13780, 15940, 20722, 27560, 31880, 41444, 42241, 51805, 82888, 84482, 103610, 168964, 207220, 211205, 337928, 414440, 422410, 549133, 844820, 1098266, 1689640, 2196532, 2745665, 4393064, 5491330, 10982660, 21965320]

約数ペア:

[(1, 21965320), (2, 10982660), (4, 5491330), (5, 4393064), (8, 2745665), (10, 2196532), (13, 1689640), (20, 1098266), (26, 844820), (40, 549133), (52, 422410), (53, 414440), (65, 337928), (104, 211205), (106, 207220), (130, 168964), (212, 103610), (260, 84482), (265, 82888), (424, 51805), (520, 42241), (530, 41444), (689, 31880), (797, 27560), (1060, 20722), (1378, 15940), (1594, 13780), (2120, 10361), (2756, 7970), (3188, 6890), (3445, 6376), (3985, 5512)]