420647560

素因数分解:

$2^3\times 5^1\times {\mathrm{821}}^1\times {\mathrm{12809}}^1$

素因数の和:13641

約数の個数: 32

約数和(自身を含む): 947683800

約数和(自身を除く): 527036240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 821, 1642, 3284, 4105, 6568, 8210, 12809, 16420, 25618, 32840, 51236, 64045, 102472, 128090, 256180, 512360, 10516189, 21032378, 42064756, 52580945, 84129512, 105161890, 210323780, 420647560]

約数ペア:

[(1, 420647560), (2, 210323780), (4, 105161890), (5, 84129512), (8, 52580945), (10, 42064756), (20, 21032378), (40, 10516189), (821, 512360), (1642, 256180), (3284, 128090), (4105, 102472), (6568, 64045), (8210, 51236), (12809, 32840), (16420, 25618)]