1639576720

素因数分解:

$2^4\times 5^1\times {\mathrm{401}}^1\times {\mathrm{51109}}^1$

素因数の和:51523

約数の個数: 40

約数和(自身を含む): 3821596920

約数和(自身を除く): 2182020200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 401, 802, 1604, 2005, 3208, 4010, 6416, 8020, 16040, 32080, 51109, 102218, 204436, 255545, 408872, 511090, 817744, 1022180, 2044360, 4088720, 20494709, 40989418, 81978836, 102473545, 163957672, 204947090, 327915344, 409894180, 819788360, 1639576720]

約数ペア:

[(1, 1639576720), (2, 819788360), (4, 409894180), (5, 327915344), (8, 204947090), (10, 163957672), (16, 102473545), (20, 81978836), (40, 40989418), (80, 20494709), (401, 4088720), (802, 2044360), (1604, 1022180), (2005, 817744), (3208, 511090), (4010, 408872), (6416, 255545), (8020, 204436), (16040, 102218), (32080, 51109)]