81606640

素因数分解:

$2^4\times 5^1\times {\mathrm{421}}^1\times {\mathrm{2423}}^1$

素因数の和:2857

約数の個数: 40

約数和(自身を含む): 190264608

約数和(自身を除く): 108657968

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 421, 842, 1684, 2105, 2423, 3368, 4210, 4846, 6736, 8420, 9692, 12115, 16840, 19384, 24230, 33680, 38768, 48460, 96920, 193840, 1020083, 2040166, 4080332, 5100415, 8160664, 10200830, 16321328, 20401660, 40803320, 81606640]

約数ペア:

[(1, 81606640), (2, 40803320), (4, 20401660), (5, 16321328), (8, 10200830), (10, 8160664), (16, 5100415), (20, 4080332), (40, 2040166), (80, 1020083), (421, 193840), (842, 96920), (1684, 48460), (2105, 38768), (2423, 33680), (3368, 24230), (4210, 19384), (4846, 16840), (6736, 12115), (8420, 9692)]