18520515

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{173}}^1$

素因数の和:261

約数の個数: 64

約数和(自身を含む): 36247680

約数和(自身を除く): 17727165

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 61, 65, 117, 135, 173, 183, 195, 305, 351, 519, 549, 585, 793, 865, 915, 1557, 1647, 1755, 2249, 2379, 2595, 2745, 3965, 4671, 6747, 7137, 7785, 8235, 10553, 11245, 11895, 20241, 21411, 23355, 31659, 33735, 35685, 52765, 60723, 94977, 101205, 107055, 137189, 158295, 284931, 303615, 411567, 474885, 685945, 1234701, 1424655, 2057835, 3704103, 6173505, 18520515]

約数ペア:

[(1, 18520515), (3, 6173505), (5, 3704103), (9, 2057835), (13, 1424655), (15, 1234701), (27, 685945), (39, 474885), (45, 411567), (61, 303615), (65, 284931), (117, 158295), (135, 137189), (173, 107055), (183, 101205), (195, 94977), (305, 60723), (351, 52765), (519, 35685), (549, 33735), (585, 31659), (793, 23355), (865, 21411), (915, 20241), (1557, 11895), (1647, 11245), (1755, 10553), (2249, 8235), (2379, 7785), (2595, 7137), (2745, 6747), (3965, 4671)]