21067875

素因数分解:

$3^2\times 5^3\times {\mathrm{61}}^1\times {\mathrm{307}}^1$

素因数の和:389

約数の個数: 48

約数和(自身を含む): 38726688

約数和(自身を除く): 17658813

約数列:

[1, 3, 5, 9, 15, 25, 45, 61, 75, 125, 183, 225, 305, 307, 375, 549, 915, 921, 1125, 1525, 1535, 2745, 2763, 4575, 4605, 7625, 7675, 13725, 13815, 18727, 22875, 23025, 38375, 56181, 68625, 69075, 93635, 115125, 168543, 280905, 345375, 468175, 842715, 1404525, 2340875, 4213575, 7022625, 21067875]

約数ペア:

[(1, 21067875), (3, 7022625), (5, 4213575), (9, 2340875), (15, 1404525), (25, 842715), (45, 468175), (61, 345375), (75, 280905), (125, 168543), (183, 115125), (225, 93635), (305, 69075), (307, 68625), (375, 56181), (549, 38375), (915, 23025), (921, 22875), (1125, 18727), (1525, 13815), (1535, 13725), (2745, 7675), (2763, 7625), (4575, 4605)]