20890720

素因数分解:

$2^5\times 5^1\times {\mathrm{59}}^1\times {\mathrm{2213}}^1$

素因数の和:2287

約数の個数: 48

約数和(自身を含む): 50213520

約数和(自身を除く): 29322800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 59, 80, 118, 160, 236, 295, 472, 590, 944, 1180, 1888, 2213, 2360, 4426, 4720, 8852, 9440, 11065, 17704, 22130, 35408, 44260, 70816, 88520, 130567, 177040, 261134, 354080, 522268, 652835, 1044536, 1305670, 2089072, 2611340, 4178144, 5222680, 10445360, 20890720]

約数ペア:

[(1, 20890720), (2, 10445360), (4, 5222680), (5, 4178144), (8, 2611340), (10, 2089072), (16, 1305670), (20, 1044536), (32, 652835), (40, 522268), (59, 354080), (80, 261134), (118, 177040), (160, 130567), (236, 88520), (295, 70816), (472, 44260), (590, 35408), (944, 22130), (1180, 17704), (1888, 11065), (2213, 9440), (2360, 8852), (4426, 4720)]