21041816

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{138433}}^1$

素因数の和:138458

約数の個数: 16

約数和(自身を含む): 41530200

約数和(自身を除く): 20488384

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 138433, 276866, 553732, 1107464, 2630227, 5260454, 10520908, 21041816]

約数ペア:

[(1, 21041816), (2, 10520908), (4, 5260454), (8, 2630227), (19, 1107464), (38, 553732), (76, 276866), (152, 138433)]