21171640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{911}}^1$

素因数の和:1012

約数の個数: 64

約数和(自身を含む): 55157760

約数和(自身を除く): 33986120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 83, 140, 166, 280, 332, 415, 581, 664, 830, 911, 1162, 1660, 1822, 2324, 2905, 3320, 3644, 4555, 4648, 5810, 6377, 7288, 9110, 11620, 12754, 18220, 23240, 25508, 31885, 36440, 51016, 63770, 75613, 127540, 151226, 255080, 302452, 378065, 529291, 604904, 756130, 1058582, 1512260, 2117164, 2646455, 3024520, 4234328, 5292910, 10585820, 21171640]

約数ペア:

[(1, 21171640), (2, 10585820), (4, 5292910), (5, 4234328), (7, 3024520), (8, 2646455), (10, 2117164), (14, 1512260), (20, 1058582), (28, 756130), (35, 604904), (40, 529291), (56, 378065), (70, 302452), (83, 255080), (140, 151226), (166, 127540), (280, 75613), (332, 63770), (415, 51016), (581, 36440), (664, 31885), (830, 25508), (911, 23240), (1162, 18220), (1660, 12754), (1822, 11620), (2324, 9110), (2905, 7288), (3320, 6377), (3644, 5810), (4555, 4648)]