20925745

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1$

素因数の和:265

約数の個数: 32

約数和(自身を含む): 28212480

約数和(自身を除く): 7286735

約数列:

[1, 5, 19, 23, 61, 95, 115, 157, 305, 437, 785, 1159, 1403, 2185, 2983, 3611, 5795, 7015, 9577, 14915, 18055, 26657, 47885, 68609, 133285, 181963, 220271, 343045, 909815, 1101355, 4185149, 20925745]

約数ペア:

[(1, 20925745), (5, 4185149), (19, 1101355), (23, 909815), (61, 343045), (95, 220271), (115, 181963), (157, 133285), (305, 68609), (437, 47885), (785, 26657), (1159, 18055), (1403, 14915), (2185, 9577), (2983, 7015), (3611, 5795)]