20317600

素因数分解:

$2^5\times 5^2\times {\mathrm{109}}^1\times {\mathrm{233}}^1$

素因数の和:362

約数の個数: 72

約数和(自身を含む): 50270220

約数和(自身を除く): 29952620

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 109, 160, 200, 218, 233, 400, 436, 466, 545, 800, 872, 932, 1090, 1165, 1744, 1864, 2180, 2330, 2725, 3488, 3728, 4360, 4660, 5450, 5825, 7456, 8720, 9320, 10900, 11650, 17440, 18640, 21800, 23300, 25397, 37280, 43600, 46600, 50794, 87200, 93200, 101588, 126985, 186400, 203176, 253970, 406352, 507940, 634925, 812704, 1015880, 1269850, 2031760, 2539700, 4063520, 5079400, 10158800, 20317600]

約数ペア:

[(1, 20317600), (2, 10158800), (4, 5079400), (5, 4063520), (8, 2539700), (10, 2031760), (16, 1269850), (20, 1015880), (25, 812704), (32, 634925), (40, 507940), (50, 406352), (80, 253970), (100, 203176), (109, 186400), (160, 126985), (200, 101588), (218, 93200), (233, 87200), (400, 50794), (436, 46600), (466, 43600), (545, 37280), (800, 25397), (872, 23300), (932, 21800), (1090, 18640), (1165, 17440), (1744, 11650), (1864, 10900), (2180, 9320), (2330, 8720), (2725, 7456), (3488, 5825), (3728, 5450), (4360, 4660)]