18405225

素因数分解:

$3^4\times 5^2\times {\mathrm{61}}^1\times {\mathrm{149}}^1$

素因数の和:232

約数の個数: 60

約数和(自身を含む): 34884300

約数和(自身を除く): 16479075

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 61, 75, 81, 135, 149, 183, 225, 305, 405, 447, 549, 675, 745, 915, 1341, 1525, 1647, 2025, 2235, 2745, 3725, 4023, 4575, 4941, 6705, 8235, 9089, 11175, 12069, 13725, 20115, 24705, 27267, 33525, 41175, 45445, 60345, 81801, 100575, 123525, 136335, 227225, 245403, 301725, 409005, 681675, 736209, 1227015, 2045025, 3681045, 6135075, 18405225]

約数ペア:

[(1, 18405225), (3, 6135075), (5, 3681045), (9, 2045025), (15, 1227015), (25, 736209), (27, 681675), (45, 409005), (61, 301725), (75, 245403), (81, 227225), (135, 136335), (149, 123525), (183, 100575), (225, 81801), (305, 60345), (405, 45445), (447, 41175), (549, 33525), (675, 27267), (745, 24705), (915, 20115), (1341, 13725), (1525, 12069), (1647, 11175), (2025, 9089), (2235, 8235), (2745, 6705), (3725, 4941), (4023, 4575)]