388163960

素因数分解:

$2^3\times 5^1\times {\mathrm{641}}^1\times {\mathrm{15139}}^1$

素因数の和:15791

約数の個数: 32

約数和(自身を含む): 874789200

約数和(自身を除く): 486625240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 641, 1282, 2564, 3205, 5128, 6410, 12820, 15139, 25640, 30278, 60556, 75695, 121112, 151390, 302780, 605560, 9704099, 19408198, 38816396, 48520495, 77632792, 97040990, 194081980, 388163960]

約数ペア:

[(1, 388163960), (2, 194081980), (4, 97040990), (5, 77632792), (8, 48520495), (10, 38816396), (20, 19408198), (40, 9704099), (641, 605560), (1282, 302780), (2564, 151390), (3205, 121112), (5128, 75695), (6410, 60556), (12820, 30278), (15139, 25640)]