21091875

素因数分解:

$3^1\times 5^4\times 7^1\times {\mathrm{1607}}^1$

素因数の和:1637

約数の個数: 40

約数和(自身を含む): 40187136

約数和(自身を除く): 19095261

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 125, 175, 375, 525, 625, 875, 1607, 1875, 2625, 4375, 4821, 8035, 11249, 13125, 24105, 33747, 40175, 56245, 120525, 168735, 200875, 281225, 602625, 843675, 1004375, 1406125, 3013125, 4218375, 7030625, 21091875]

約数ペア:

[(1, 21091875), (3, 7030625), (5, 4218375), (7, 3013125), (15, 1406125), (21, 1004375), (25, 843675), (35, 602625), (75, 281225), (105, 200875), (125, 168735), (175, 120525), (375, 56245), (525, 40175), (625, 33747), (875, 24105), (1607, 13125), (1875, 11249), (2625, 8035), (4375, 4821)]