16421317480

素因数分解:

$2^3\times 5^1\times {\mathrm{641}}^1\times {\mathrm{640457}}^1$

素因数の和:641109

約数の個数: 32

約数和(自身を含む): 37005663240

約数和(自身を除く): 20584345760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 641, 1282, 2564, 3205, 5128, 6410, 12820, 25640, 640457, 1280914, 2561828, 3202285, 5123656, 6404570, 12809140, 25618280, 410532937, 821065874, 1642131748, 2052664685, 3284263496, 4105329370, 8210658740, 16421317480]

約数ペア:

[(1, 16421317480), (2, 8210658740), (4, 4105329370), (5, 3284263496), (8, 2052664685), (10, 1642131748), (20, 821065874), (40, 410532937), (641, 25618280), (1282, 12809140), (2564, 6404570), (3205, 5123656), (5128, 3202285), (6410, 2561828), (12820, 1280914), (25640, 640457)]