20978625

素因数分解:

$3^1\times 5^3\times {\mathrm{43}}^1\times {\mathrm{1301}}^1$

素因数の和:1362

約数の個数: 32

約数和(自身を含む): 35747712

約数和(自身を除く): 14769087

約数列:

[1, 3, 5, 15, 25, 43, 75, 125, 129, 215, 375, 645, 1075, 1301, 3225, 3903, 5375, 6505, 16125, 19515, 32525, 55943, 97575, 162625, 167829, 279715, 487875, 839145, 1398575, 4195725, 6992875, 20978625]

約数ペア:

[(1, 20978625), (3, 6992875), (5, 4195725), (15, 1398575), (25, 839145), (43, 487875), (75, 279715), (125, 167829), (129, 162625), (215, 97575), (375, 55943), (645, 32525), (1075, 19515), (1301, 16125), (3225, 6505), (3903, 5375)]