21012915

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{113}}^1$

素因数の和:169

約数の個数: 96

約数和(自身を含む): 44914176

約数和(自身を除く): 23901261

約数列:

[1, 3, 5, 7, 11, 15, 21, 23, 33, 35, 49, 55, 69, 77, 105, 113, 115, 147, 161, 165, 231, 245, 253, 339, 345, 385, 483, 539, 565, 735, 759, 791, 805, 1127, 1155, 1243, 1265, 1617, 1695, 1771, 2373, 2415, 2599, 2695, 3381, 3729, 3795, 3955, 5313, 5537, 5635, 6215, 7797, 8085, 8701, 8855, 11865, 12397, 12995, 16611, 16905, 18193, 18645, 26103, 26565, 27685, 28589, 37191, 38985, 43505, 54579, 60907, 61985, 83055, 85767, 90965, 127351, 130515, 142945, 182721, 185955, 200123, 272895, 304535, 382053, 428835, 600369, 636755, 913605, 1000615, 1400861, 1910265, 3001845, 4202583, 7004305, 21012915]

約数ペア:

[(1, 21012915), (3, 7004305), (5, 4202583), (7, 3001845), (11, 1910265), (15, 1400861), (21, 1000615), (23, 913605), (33, 636755), (35, 600369), (49, 428835), (55, 382053), (69, 304535), (77, 272895), (105, 200123), (113, 185955), (115, 182721), (147, 142945), (161, 130515), (165, 127351), (231, 90965), (245, 85767), (253, 83055), (339, 61985), (345, 60907), (385, 54579), (483, 43505), (539, 38985), (565, 37191), (735, 28589), (759, 27685), (791, 26565), (805, 26103), (1127, 18645), (1155, 18193), (1243, 16905), (1265, 16611), (1617, 12995), (1695, 12397), (1771, 11865), (2373, 8855), (2415, 8701), (2599, 8085), (2695, 7797), (3381, 6215), (3729, 5635), (3795, 5537), (3955, 5313)]