20212660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{269}}^1$

素因数の和:325

約数の個数: 72

約数和(自身を含む): 48739320

約数和(自身を除く): 28526660

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 269, 289, 340, 442, 538, 578, 884, 1076, 1105, 1156, 1345, 1445, 2210, 2690, 2890, 3497, 3757, 4420, 4573, 5380, 5780, 6994, 7514, 9146, 13988, 15028, 17485, 18292, 18785, 22865, 34970, 37570, 45730, 59449, 69940, 75140, 77741, 91460, 118898, 155482, 237796, 297245, 310964, 388705, 594490, 777410, 1010633, 1188980, 1554820, 2021266, 4042532, 5053165, 10106330, 20212660]

約数ペア:

[(1, 20212660), (2, 10106330), (4, 5053165), (5, 4042532), (10, 2021266), (13, 1554820), (17, 1188980), (20, 1010633), (26, 777410), (34, 594490), (52, 388705), (65, 310964), (68, 297245), (85, 237796), (130, 155482), (170, 118898), (221, 91460), (260, 77741), (269, 75140), (289, 69940), (340, 59449), (442, 45730), (538, 37570), (578, 34970), (884, 22865), (1076, 18785), (1105, 18292), (1156, 17485), (1345, 15028), (1445, 13988), (2210, 9146), (2690, 7514), (2890, 6994), (3497, 5780), (3757, 5380), (4420, 4573)]