18213975

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^2\times {\mathrm{479}}^1$

素因数の和:521

約数の個数: 54

約数和(自身を含む): 35399520

約数和(自身を除く): 17185545

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 45, 65, 75, 117, 169, 195, 225, 325, 479, 507, 585, 845, 975, 1437, 1521, 2395, 2535, 2925, 4225, 4311, 6227, 7185, 7605, 11975, 12675, 18681, 21555, 31135, 35925, 38025, 56043, 80951, 93405, 107775, 155675, 242853, 280215, 404755, 467025, 728559, 1214265, 1401075, 2023775, 3642795, 6071325, 18213975]

約数ペア:

[(1, 18213975), (3, 6071325), (5, 3642795), (9, 2023775), (13, 1401075), (15, 1214265), (25, 728559), (39, 467025), (45, 404755), (65, 280215), (75, 242853), (117, 155675), (169, 107775), (195, 93405), (225, 80951), (325, 56043), (479, 38025), (507, 35925), (585, 31135), (845, 21555), (975, 18681), (1437, 12675), (1521, 11975), (2395, 7605), (2535, 7185), (2925, 6227), (4225, 4311)]