20170875

素因数分解:

$3^1\times 5^3\times {\mathrm{19}}^2\times {\mathrm{149}}^1$

素因数の和:205

約数の個数: 48

約数和(自身を含む): 35661600

約数和(自身を除く): 15490725

約数列:

[1, 3, 5, 15, 19, 25, 57, 75, 95, 125, 149, 285, 361, 375, 447, 475, 745, 1083, 1425, 1805, 2235, 2375, 2831, 3725, 5415, 7125, 8493, 9025, 11175, 14155, 18625, 27075, 42465, 45125, 53789, 55875, 70775, 135375, 161367, 212325, 268945, 353875, 806835, 1061625, 1344725, 4034175, 6723625, 20170875]

約数ペア:

[(1, 20170875), (3, 6723625), (5, 4034175), (15, 1344725), (19, 1061625), (25, 806835), (57, 353875), (75, 268945), (95, 212325), (125, 161367), (149, 135375), (285, 70775), (361, 55875), (375, 53789), (447, 45125), (475, 42465), (745, 27075), (1083, 18625), (1425, 14155), (1805, 11175), (2235, 9025), (2375, 8493), (2831, 7125), (3725, 5415)]