21399472

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{70393}}^1$

素因数の和:70420

約数の個数: 20

約数和(自身を含む): 43644280

約数和(自身を除く): 22244808

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 70393, 140786, 281572, 563144, 1126288, 1337467, 2674934, 5349868, 10699736, 21399472]

約数ペア:

[(1, 21399472), (2, 10699736), (4, 5349868), (8, 2674934), (16, 1337467), (19, 1126288), (38, 563144), (76, 281572), (152, 140786), (304, 70393)]