21206848

素因数分解:

$2^6\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{359}}^1$

素因数の和:455

約数の個数: 56

約数和(自身を含む): 46085760

約数和(自身を除く): 24878912

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 71, 104, 142, 208, 284, 359, 416, 568, 718, 832, 923, 1136, 1436, 1846, 2272, 2872, 3692, 4544, 4667, 5744, 7384, 9334, 11488, 14768, 18668, 22976, 25489, 29536, 37336, 50978, 59072, 74672, 101956, 149344, 203912, 298688, 331357, 407824, 662714, 815648, 1325428, 1631296, 2650856, 5301712, 10603424, 21206848]

約数ペア:

[(1, 21206848), (2, 10603424), (4, 5301712), (8, 2650856), (13, 1631296), (16, 1325428), (26, 815648), (32, 662714), (52, 407824), (64, 331357), (71, 298688), (104, 203912), (142, 149344), (208, 101956), (284, 74672), (359, 59072), (416, 50978), (568, 37336), (718, 29536), (832, 25489), (923, 22976), (1136, 18668), (1436, 14768), (1846, 11488), (2272, 9334), (2872, 7384), (3692, 5744), (4544, 4667)]