20120780180

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{127}}^1\times {\mathrm{197}}^1\times {\mathrm{509}}^1$

素因数の和:921

約数の個数: 96

約数和(自身を含む): 43429478400

約数和(自身を除く): 23308698220

約数列:

[1, 2, 4, 5, 10, 20, 79, 127, 158, 197, 254, 316, 394, 395, 508, 509, 635, 788, 790, 985, 1018, 1270, 1580, 1970, 2036, 2540, 2545, 3940, 5090, 10033, 10180, 15563, 20066, 25019, 31126, 40132, 40211, 50038, 50165, 62252, 64643, 77815, 80422, 100076, 100273, 100330, 125095, 129286, 155630, 160844, 200546, 200660, 201055, 250190, 258572, 311260, 323215, 401092, 402110, 500380, 501365, 646430, 804220, 1002730, 1292860, 1976501, 2005460, 3953002, 5106797, 7906004, 7921567, 9882505, 10213594, 12734671, 15843134, 19765010, 20427188, 25469342, 25533985, 31686268, 39530020, 39607835, 50938684, 51067970, 63673355, 79215670, 102135940, 127346710, 158431340, 254693420, 1006039009, 2012078018, 4024156036, 5030195045, 10060390090, 20120780180]

約数ペア:

[(1, 20120780180), (2, 10060390090), (4, 5030195045), (5, 4024156036), (10, 2012078018), (20, 1006039009), (79, 254693420), (127, 158431340), (158, 127346710), (197, 102135940), (254, 79215670), (316, 63673355), (394, 51067970), (395, 50938684), (508, 39607835), (509, 39530020), (635, 31686268), (788, 25533985), (790, 25469342), (985, 20427188), (1018, 19765010), (1270, 15843134), (1580, 12734671), (1970, 10213594), (2036, 9882505), (2540, 7921567), (2545, 7906004), (3940, 5106797), (5090, 3953002), (10033, 2005460), (10180, 1976501), (15563, 1292860), (20066, 1002730), (25019, 804220), (31126, 646430), (40132, 501365), (40211, 500380), (50038, 402110), (50165, 401092), (62252, 323215), (64643, 311260), (77815, 258572), (80422, 250190), (100076, 201055), (100273, 200660), (100330, 200546), (125095, 160844), (129286, 155630)]