20901875

素因数分解:

$5^4\times {\mathrm{53}}^1\times {\mathrm{631}}^1$

素因数の和:704

約数の個数: 20

約数和(自身を含む): 26653968

約数和(自身を除く): 5752093

約数列:

[1, 5, 25, 53, 125, 265, 625, 631, 1325, 3155, 6625, 15775, 33125, 33443, 78875, 167215, 394375, 836075, 4180375, 20901875]

約数ペア:

[(1, 20901875), (5, 4180375), (25, 836075), (53, 394375), (125, 167215), (265, 78875), (625, 33443), (631, 33125), (1325, 15775), (3155, 6625)]