21913905

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{1031}}^1$

素因数の和:1161

約数の個数: 32

約数和(自身を含む): 38142720

約数和(自身を除く): 16228815

約数列:

[1, 3, 5, 13, 15, 39, 65, 109, 195, 327, 545, 1031, 1417, 1635, 3093, 4251, 5155, 7085, 13403, 15465, 21255, 40209, 67015, 112379, 201045, 337137, 561895, 1460927, 1685685, 4382781, 7304635, 21913905]

約数ペア:

[(1, 21913905), (3, 7304635), (5, 4382781), (13, 1685685), (15, 1460927), (39, 561895), (65, 337137), (109, 201045), (195, 112379), (327, 67015), (545, 40209), (1031, 21255), (1417, 15465), (1635, 13403), (3093, 7085), (4251, 5155)]