20801520

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{167}}^1\times {\mathrm{173}}^1$

素因数の和:359

約数の個数: 120

約数和(自身を含む): 70682976

約数和(自身を除く): 49881456

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 167, 173, 180, 240, 334, 346, 360, 501, 519, 668, 692, 720, 835, 865, 1002, 1038, 1336, 1384, 1503, 1557, 1670, 1730, 2004, 2076, 2505, 2595, 2672, 2768, 3006, 3114, 3340, 3460, 4008, 4152, 5010, 5190, 6012, 6228, 6680, 6920, 7515, 7785, 8016, 8304, 10020, 10380, 12024, 12456, 13360, 13840, 15030, 15570, 20040, 20760, 24048, 24912, 28891, 30060, 31140, 40080, 41520, 57782, 60120, 62280, 86673, 115564, 120240, 124560, 144455, 173346, 231128, 260019, 288910, 346692, 433365, 462256, 520038, 577820, 693384, 866730, 1040076, 1155640, 1300095, 1386768, 1733460, 2080152, 2311280, 2600190, 3466920, 4160304, 5200380, 6933840, 10400760, 20801520]

約数ペア:

[(1, 20801520), (2, 10400760), (3, 6933840), (4, 5200380), (5, 4160304), (6, 3466920), (8, 2600190), (9, 2311280), (10, 2080152), (12, 1733460), (15, 1386768), (16, 1300095), (18, 1155640), (20, 1040076), (24, 866730), (30, 693384), (36, 577820), (40, 520038), (45, 462256), (48, 433365), (60, 346692), (72, 288910), (80, 260019), (90, 231128), (120, 173346), (144, 144455), (167, 124560), (173, 120240), (180, 115564), (240, 86673), (334, 62280), (346, 60120), (360, 57782), (501, 41520), (519, 40080), (668, 31140), (692, 30060), (720, 28891), (835, 24912), (865, 24048), (1002, 20760), (1038, 20040), (1336, 15570), (1384, 15030), (1503, 13840), (1557, 13360), (1670, 12456), (1730, 12024), (2004, 10380), (2076, 10020), (2505, 8304), (2595, 8016), (2672, 7785), (2768, 7515), (3006, 6920), (3114, 6680), (3340, 6228), (3460, 6012), (4008, 5190), (4152, 5010)]