20987512

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{227}}^1$

素因数の和:380

約数の個数: 64

約数和(自身を含む): 49029120

約数和(自身を除く): 28041608

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 127, 182, 227, 254, 364, 454, 508, 728, 889, 908, 1016, 1589, 1651, 1778, 1816, 2951, 3178, 3302, 3556, 5902, 6356, 6604, 7112, 11557, 11804, 12712, 13208, 20657, 23114, 23608, 28829, 41314, 46228, 57658, 82628, 92456, 115316, 165256, 201803, 230632, 374777, 403606, 749554, 807212, 1499108, 1614424, 2623439, 2998216, 5246878, 10493756, 20987512]

約数ペア:

[(1, 20987512), (2, 10493756), (4, 5246878), (7, 2998216), (8, 2623439), (13, 1614424), (14, 1499108), (26, 807212), (28, 749554), (52, 403606), (56, 374777), (91, 230632), (104, 201803), (127, 165256), (182, 115316), (227, 92456), (254, 82628), (364, 57658), (454, 46228), (508, 41314), (728, 28829), (889, 23608), (908, 23114), (1016, 20657), (1589, 13208), (1651, 12712), (1778, 11804), (1816, 11557), (2951, 7112), (3178, 6604), (3302, 6356), (3556, 5902)]