21871245

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1$

素因数の和:174

約数の個数: 64

約数和(自身を含む): 40497408

約数和(自身を除く): 18626163

約数列:

[1, 3, 5, 11, 15, 33, 41, 53, 55, 61, 123, 159, 165, 183, 205, 265, 305, 451, 583, 615, 671, 795, 915, 1353, 1749, 2013, 2173, 2255, 2501, 2915, 3233, 3355, 6519, 6765, 7503, 8745, 9699, 10065, 10865, 12505, 16165, 23903, 27511, 32595, 35563, 37515, 48495, 71709, 82533, 106689, 119515, 132553, 137555, 177815, 358545, 397659, 412665, 533445, 662765, 1458083, 1988295, 4374249, 7290415, 21871245]

約数ペア:

[(1, 21871245), (3, 7290415), (5, 4374249), (11, 1988295), (15, 1458083), (33, 662765), (41, 533445), (53, 412665), (55, 397659), (61, 358545), (123, 177815), (159, 137555), (165, 132553), (183, 119515), (205, 106689), (265, 82533), (305, 71709), (451, 48495), (583, 37515), (615, 35563), (671, 32595), (795, 27511), (915, 23903), (1353, 16165), (1749, 12505), (2013, 10865), (2173, 10065), (2255, 9699), (2501, 8745), (2915, 7503), (3233, 6765), (3355, 6519)]