19876545

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{557}}^1$

素因数の和:642

約数の個数: 48

約数和(自身を含む): 37778832

約数和(自身を除く): 17902287

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 61, 65, 117, 183, 195, 305, 549, 557, 585, 793, 915, 1671, 2379, 2745, 2785, 3965, 5013, 7137, 7241, 8355, 11895, 21723, 25065, 33977, 35685, 36205, 65169, 101931, 108615, 169885, 305793, 325845, 441701, 509655, 1325103, 1528965, 2208505, 3975309, 6625515, 19876545]

約数ペア:

[(1, 19876545), (3, 6625515), (5, 3975309), (9, 2208505), (13, 1528965), (15, 1325103), (39, 509655), (45, 441701), (61, 325845), (65, 305793), (117, 169885), (183, 108615), (195, 101931), (305, 65169), (549, 36205), (557, 35685), (585, 33977), (793, 25065), (915, 21723), (1671, 11895), (2379, 8355), (2745, 7241), (2785, 7137), (3965, 5013)]