21104408

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{307}}^1\times {\mathrm{661}}^1$

素因数の和:987

約数の個数: 32

約数和(自身を含む): 42818160

約数和(自身を除く): 21713752

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 307, 614, 661, 1228, 1322, 2456, 2644, 3991, 5288, 7982, 8593, 15964, 17186, 31928, 34372, 68744, 202927, 405854, 811708, 1623416, 2638051, 5276102, 10552204, 21104408]

約数ペア:

[(1, 21104408), (2, 10552204), (4, 5276102), (8, 2638051), (13, 1623416), (26, 811708), (52, 405854), (104, 202927), (307, 68744), (614, 34372), (661, 31928), (1228, 17186), (1322, 15964), (2456, 8593), (2644, 7982), (3991, 5288)]