21708125

素因数分解:

$5^4\times {\mathrm{47}}^1\times {\mathrm{739}}^1$

素因数の和:806

約数の個数: 20

約数和(自身を含む): 27741120

約数和(自身を除く): 6032995

約数列:

[1, 5, 25, 47, 125, 235, 625, 739, 1175, 3695, 5875, 18475, 29375, 34733, 92375, 173665, 461875, 868325, 4341625, 21708125]

約数ペア:

[(1, 21708125), (5, 4341625), (25, 868325), (47, 461875), (125, 173665), (235, 92375), (625, 34733), (739, 29375), (1175, 18475), (3695, 5875)]