20957456

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{5303}}^1$

素因数の和:5343

約数の個数: 40

約数和(自身を含む): 46038720

約数和(自身を除く): 25081264

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 38, 52, 76, 104, 152, 208, 247, 304, 494, 988, 1976, 3952, 5303, 10606, 21212, 42424, 68939, 84848, 100757, 137878, 201514, 275756, 403028, 551512, 806056, 1103024, 1309841, 1612112, 2619682, 5239364, 10478728, 20957456]

約数ペア:

[(1, 20957456), (2, 10478728), (4, 5239364), (8, 2619682), (13, 1612112), (16, 1309841), (19, 1103024), (26, 806056), (38, 551512), (52, 403028), (76, 275756), (104, 201514), (152, 137878), (208, 100757), (247, 84848), (304, 68939), (494, 42424), (988, 21212), (1976, 10606), (3952, 5303)]