21670428

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{2621}}^1$

素因数の和:2694

約数の個数: 48

約数和(自身を含む): 55502496

約数和(自身を除く): 33832068

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 53, 78, 106, 156, 159, 212, 318, 636, 689, 1378, 2067, 2621, 2756, 4134, 5242, 7863, 8268, 10484, 15726, 31452, 34073, 68146, 102219, 136292, 138913, 204438, 277826, 408876, 416739, 555652, 833478, 1666956, 1805869, 3611738, 5417607, 7223476, 10835214, 21670428]

約数ペア:

[(1, 21670428), (2, 10835214), (3, 7223476), (4, 5417607), (6, 3611738), (12, 1805869), (13, 1666956), (26, 833478), (39, 555652), (52, 416739), (53, 408876), (78, 277826), (106, 204438), (156, 138913), (159, 136292), (212, 102219), (318, 68146), (636, 34073), (689, 31452), (1378, 15726), (2067, 10484), (2621, 8268), (2756, 7863), (4134, 5242)]