20807020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{1013}}^1$

素因数の和:1114

約数の個数: 48

約数和(自身を含む): 47698560

約数和(自身を除く): 26891540

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 79, 130, 158, 260, 316, 395, 790, 1013, 1027, 1580, 2026, 2054, 4052, 4108, 5065, 5135, 10130, 10270, 13169, 20260, 20540, 26338, 52676, 65845, 80027, 131690, 160054, 263380, 320108, 400135, 800270, 1040351, 1600540, 2080702, 4161404, 5201755, 10403510, 20807020]

約数ペア:

[(1, 20807020), (2, 10403510), (4, 5201755), (5, 4161404), (10, 2080702), (13, 1600540), (20, 1040351), (26, 800270), (52, 400135), (65, 320108), (79, 263380), (130, 160054), (158, 131690), (260, 80027), (316, 65845), (395, 52676), (790, 26338), (1013, 20540), (1027, 20260), (1580, 13169), (2026, 10270), (2054, 10130), (4052, 5135), (4108, 5065)]