21351525

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{359}}^1$

素因数の和:446

約数の個数: 48

約数和(自身を含む): 38747520

約数和(自身を除く): 17395995

約数列:

[1, 3, 5, 13, 15, 25, 39, 61, 65, 75, 183, 195, 305, 325, 359, 793, 915, 975, 1077, 1525, 1795, 2379, 3965, 4575, 4667, 5385, 8975, 11895, 14001, 19825, 21899, 23335, 26925, 59475, 65697, 70005, 109495, 116675, 284687, 328485, 350025, 547475, 854061, 1423435, 1642425, 4270305, 7117175, 21351525]

約数ペア:

[(1, 21351525), (3, 7117175), (5, 4270305), (13, 1642425), (15, 1423435), (25, 854061), (39, 547475), (61, 350025), (65, 328485), (75, 284687), (183, 116675), (195, 109495), (305, 70005), (325, 65697), (359, 59475), (793, 26925), (915, 23335), (975, 21899), (1077, 19825), (1525, 14001), (1795, 11895), (2379, 8975), (3965, 5385), (4575, 4667)]