85290320

素因数分解:

$2^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9781}}^1$

素因数の和:9903

約数の個数: 40

約数和(自身を含む): 200139720

約数和(自身を除く): 114849400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 436, 545, 872, 1090, 1744, 2180, 4360, 8720, 9781, 19562, 39124, 48905, 78248, 97810, 156496, 195620, 391240, 782480, 1066129, 2132258, 4264516, 5330645, 8529032, 10661290, 17058064, 21322580, 42645160, 85290320]

約数ペア:

[(1, 85290320), (2, 42645160), (4, 21322580), (5, 17058064), (8, 10661290), (10, 8529032), (16, 5330645), (20, 4264516), (40, 2132258), (80, 1066129), (109, 782480), (218, 391240), (436, 195620), (545, 156496), (872, 97810), (1090, 78248), (1744, 48905), (2180, 39124), (4360, 19562), (8720, 9781)]