20982760

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{523}}^1$

素因数の和:610

約数の個数: 64

約数和(自身を含む): 50932800

約数和(自身を除く): 29950040

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 59, 68, 85, 118, 136, 170, 236, 295, 340, 472, 523, 590, 680, 1003, 1046, 1180, 2006, 2092, 2360, 2615, 4012, 4184, 5015, 5230, 8024, 8891, 10030, 10460, 17782, 20060, 20920, 30857, 35564, 40120, 44455, 61714, 71128, 88910, 123428, 154285, 177820, 246856, 308570, 355640, 524569, 617140, 1049138, 1234280, 2098276, 2622845, 4196552, 5245690, 10491380, 20982760]

約数ペア:

[(1, 20982760), (2, 10491380), (4, 5245690), (5, 4196552), (8, 2622845), (10, 2098276), (17, 1234280), (20, 1049138), (34, 617140), (40, 524569), (59, 355640), (68, 308570), (85, 246856), (118, 177820), (136, 154285), (170, 123428), (236, 88910), (295, 71128), (340, 61714), (472, 44455), (523, 40120), (590, 35564), (680, 30857), (1003, 20920), (1046, 20060), (1180, 17782), (2006, 10460), (2092, 10030), (2360, 8891), (2615, 8024), (4012, 5230), (4184, 5015)]