21161556

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{439}}^1$

素因数の和:565

約数の個数: 72

約数和(自身を含む): 58298240

約数和(自身を除く): 37136684

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 78, 103, 117, 156, 206, 234, 309, 412, 439, 468, 618, 878, 927, 1236, 1317, 1339, 1756, 1854, 2634, 2678, 3708, 3951, 4017, 5268, 5356, 5707, 7902, 8034, 11414, 12051, 15804, 16068, 17121, 22828, 24102, 34242, 45217, 48204, 51363, 68484, 90434, 102726, 135651, 180868, 205452, 271302, 406953, 542604, 587821, 813906, 1175642, 1627812, 1763463, 2351284, 3526926, 5290389, 7053852, 10580778, 21161556]

約数ペア:

[(1, 21161556), (2, 10580778), (3, 7053852), (4, 5290389), (6, 3526926), (9, 2351284), (12, 1763463), (13, 1627812), (18, 1175642), (26, 813906), (36, 587821), (39, 542604), (52, 406953), (78, 271302), (103, 205452), (117, 180868), (156, 135651), (206, 102726), (234, 90434), (309, 68484), (412, 51363), (439, 48204), (468, 45217), (618, 34242), (878, 24102), (927, 22828), (1236, 17121), (1317, 16068), (1339, 15804), (1756, 12051), (1854, 11414), (2634, 8034), (2678, 7902), (3708, 5707), (3951, 5356), (4017, 5268)]