20121388280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{503}}^1\times {\mathrm{142867}}^1$

素因数の和:143388

約数の個数: 64

約数和(自身を含む): 51843939840

約数和(自身を除く): 31722551560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 503, 1006, 2012, 2515, 3521, 4024, 5030, 7042, 10060, 14084, 17605, 20120, 28168, 35210, 70420, 140840, 142867, 285734, 571468, 714335, 1000069, 1142936, 1428670, 2000138, 2857340, 4000276, 5000345, 5714680, 8000552, 10000690, 20001380, 40002760, 71862101, 143724202, 287448404, 359310505, 503034707, 574896808, 718621010, 1006069414, 1437242020, 2012138828, 2515173535, 2874484040, 4024277656, 5030347070, 10060694140, 20121388280]

約数ペア:

[(1, 20121388280), (2, 10060694140), (4, 5030347070), (5, 4024277656), (7, 2874484040), (8, 2515173535), (10, 2012138828), (14, 1437242020), (20, 1006069414), (28, 718621010), (35, 574896808), (40, 503034707), (56, 359310505), (70, 287448404), (140, 143724202), (280, 71862101), (503, 40002760), (1006, 20001380), (2012, 10000690), (2515, 8000552), (3521, 5714680), (4024, 5000345), (5030, 4000276), (7042, 2857340), (10060, 2000138), (14084, 1428670), (17605, 1142936), (20120, 1000069), (28168, 714335), (35210, 571468), (70420, 285734), (140840, 142867)]