21418928

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{70457}}^1$

素因数の和:70484

約数の個数: 20

約数和(自身を含む): 43683960

約数和(自身を除く): 22265032

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 70457, 140914, 281828, 563656, 1127312, 1338683, 2677366, 5354732, 10709464, 21418928]

約数ペア:

[(1, 21418928), (2, 10709464), (4, 5354732), (8, 2677366), (16, 1338683), (19, 1127312), (38, 563656), (76, 281828), (152, 140914), (304, 70457)]