21100144

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{1663}}^1$

素因数の和:1745

約数の個数: 40

約数和(自身を含む): 44774912

約数和(自身を除く): 23674768

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 61, 104, 122, 208, 244, 488, 793, 976, 1586, 1663, 3172, 3326, 6344, 6652, 12688, 13304, 21619, 26608, 43238, 86476, 101443, 172952, 202886, 345904, 405772, 811544, 1318759, 1623088, 2637518, 5275036, 10550072, 21100144]

約数ペア:

[(1, 21100144), (2, 10550072), (4, 5275036), (8, 2637518), (13, 1623088), (16, 1318759), (26, 811544), (52, 405772), (61, 345904), (104, 202886), (122, 172952), (208, 101443), (244, 86476), (488, 43238), (793, 26608), (976, 21619), (1586, 13304), (1663, 12688), (3172, 6652), (3326, 6344)]