20901406

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{127}}^1$

素因数の和:280

約数の個数: 32

約数和(自身を含む): 34283520

約数和(自身を除く): 13382114

約数列:

[1, 2, 19, 38, 61, 71, 122, 127, 142, 254, 1159, 1349, 2318, 2413, 2698, 4331, 4826, 7747, 8662, 9017, 15494, 18034, 82289, 147193, 164578, 171323, 294386, 342646, 550037, 1100074, 10450703, 20901406]

約数ペア:

[(1, 20901406), (2, 10450703), (19, 1100074), (38, 550037), (61, 342646), (71, 294386), (122, 171323), (127, 164578), (142, 147193), (254, 82289), (1159, 18034), (1349, 15494), (2318, 9017), (2413, 8662), (2698, 7747), (4331, 4826)]