20878625

素因数分解:

$5^3\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{149}}^1$

素因数の和:242

約数の個数: 32

約数和(自身を含む): 28080000

約数和(自身を除く): 7201375

約数列:

[1, 5, 19, 25, 59, 95, 125, 149, 295, 475, 745, 1121, 1475, 2375, 2831, 3725, 5605, 7375, 8791, 14155, 18625, 28025, 43955, 70775, 140125, 167029, 219775, 353875, 835145, 1098875, 4175725, 20878625]

約数ペア:

[(1, 20878625), (5, 4175725), (19, 1098875), (25, 835145), (59, 353875), (95, 219775), (125, 167029), (149, 140125), (295, 70775), (475, 43955), (745, 28025), (1121, 18625), (1475, 14155), (2375, 8791), (2831, 7375), (3725, 5605)]