638960065

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{139}}^1\times {\mathrm{631}}^1$

素因数の和:853

約数の個数: 32

約数和(自身を含む): 815431680

約数和(自身を除く): 176471615

約数列:

[1, 5, 31, 47, 139, 155, 235, 631, 695, 1457, 3155, 4309, 6533, 7285, 19561, 21545, 29657, 32665, 87709, 97805, 148285, 202523, 438545, 919367, 1012615, 2718979, 4122323, 4596835, 13594895, 20611615, 127792013, 638960065]

約数ペア:

[(1, 638960065), (5, 127792013), (31, 20611615), (47, 13594895), (139, 4596835), (155, 4122323), (235, 2718979), (631, 1012615), (695, 919367), (1457, 438545), (3155, 202523), (4309, 148285), (6533, 97805), (7285, 87709), (19561, 32665), (21545, 29657)]