20917620

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{1471}}^1$

素因数の和:1565

約数の個数: 72

約数和(自身を含む): 64296960

約数和(自身を除く): 43379340

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 79, 90, 158, 180, 237, 316, 395, 474, 711, 790, 948, 1185, 1422, 1471, 1580, 2370, 2844, 2942, 3555, 4413, 4740, 5884, 7110, 7355, 8826, 13239, 14220, 14710, 17652, 22065, 26478, 29420, 44130, 52956, 66195, 88260, 116209, 132390, 232418, 264780, 348627, 464836, 581045, 697254, 1045881, 1162090, 1394508, 1743135, 2091762, 2324180, 3486270, 4183524, 5229405, 6972540, 10458810, 20917620]

約数ペア:

[(1, 20917620), (2, 10458810), (3, 6972540), (4, 5229405), (5, 4183524), (6, 3486270), (9, 2324180), (10, 2091762), (12, 1743135), (15, 1394508), (18, 1162090), (20, 1045881), (30, 697254), (36, 581045), (45, 464836), (60, 348627), (79, 264780), (90, 232418), (158, 132390), (180, 116209), (237, 88260), (316, 66195), (395, 52956), (474, 44130), (711, 29420), (790, 26478), (948, 22065), (1185, 17652), (1422, 14710), (1471, 14220), (1580, 13239), (2370, 8826), (2844, 7355), (2942, 7110), (3555, 5884), (4413, 4740)]