1639207880

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{281}}^1\times {\mathrm{3557}}^1$

素因数の和:3890

約数の個数: 64

約数和(自身を含む): 3792685680

約数和(自身を除く): 2153477800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 281, 328, 410, 562, 820, 1124, 1405, 1640, 2248, 2810, 3557, 5620, 7114, 11240, 11521, 14228, 17785, 23042, 28456, 35570, 46084, 57605, 71140, 92168, 115210, 142280, 145837, 230420, 291674, 460840, 583348, 729185, 999517, 1166696, 1458370, 1999034, 2916740, 3998068, 4997585, 5833480, 7996136, 9995170, 19990340, 39980680, 40980197, 81960394, 163920788, 204900985, 327841576, 409801970, 819603940, 1639207880]

約数ペア:

[(1, 1639207880), (2, 819603940), (4, 409801970), (5, 327841576), (8, 204900985), (10, 163920788), (20, 81960394), (40, 40980197), (41, 39980680), (82, 19990340), (164, 9995170), (205, 7996136), (281, 5833480), (328, 4997585), (410, 3998068), (562, 2916740), (820, 1999034), (1124, 1458370), (1405, 1166696), (1640, 999517), (2248, 729185), (2810, 583348), (3557, 460840), (5620, 291674), (7114, 230420), (11240, 145837), (11521, 142280), (14228, 115210), (17785, 92168), (23042, 71140), (28456, 57605), (35570, 46084)]