20729120780

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{521}}^1\times {\mathrm{18251}}^1$

素因数の和:18890

約数の個数: 48

約数和(自身を含む): 44017253280

約数和(自身を除く): 23288132500

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 521, 545, 1042, 1090, 2084, 2180, 2605, 5210, 10420, 18251, 36502, 56789, 73004, 91255, 113578, 182510, 227156, 283945, 365020, 567890, 1135780, 1989359, 3978718, 7957436, 9508771, 9946795, 19017542, 19893590, 38035084, 39787180, 47543855, 95087710, 190175420, 1036456039, 2072912078, 4145824156, 5182280195, 10364560390, 20729120780]

約数ペア:

[(1, 20729120780), (2, 10364560390), (4, 5182280195), (5, 4145824156), (10, 2072912078), (20, 1036456039), (109, 190175420), (218, 95087710), (436, 47543855), (521, 39787180), (545, 38035084), (1042, 19893590), (1090, 19017542), (2084, 9946795), (2180, 9508771), (2605, 7957436), (5210, 3978718), (10420, 1989359), (18251, 1135780), (36502, 567890), (56789, 365020), (73004, 283945), (91255, 227156), (113578, 182510)]