20492420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{269}}^1\times {\mathrm{293}}^1$

素因数の和:584

約数の個数: 48

約数和(自身を含む): 46675440

約数和(自身を除く): 26183020

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 269, 293, 538, 586, 1076, 1172, 1345, 1465, 2690, 2930, 3497, 3809, 5380, 5860, 6994, 7618, 13988, 15236, 17485, 19045, 34970, 38090, 69940, 76180, 78817, 157634, 315268, 394085, 788170, 1024621, 1576340, 2049242, 4098484, 5123105, 10246210, 20492420]

約数ペア:

[(1, 20492420), (2, 10246210), (4, 5123105), (5, 4098484), (10, 2049242), (13, 1576340), (20, 1024621), (26, 788170), (52, 394085), (65, 315268), (130, 157634), (260, 78817), (269, 76180), (293, 69940), (538, 38090), (586, 34970), (1076, 19045), (1172, 17485), (1345, 15236), (1465, 13988), (2690, 7618), (2930, 6994), (3497, 5860), (3809, 5380)]