20921584

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{68821}}^1$

素因数の和:68848

約数の個数: 20

約数和(自身を含む): 42669640

約数和(自身を除く): 21748056

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 68821, 137642, 275284, 550568, 1101136, 1307599, 2615198, 5230396, 10460792, 20921584]

約数ペア:

[(1, 20921584), (2, 10460792), (4, 5230396), (8, 2615198), (16, 1307599), (19, 1101136), (38, 550568), (76, 275284), (152, 137642), (304, 68821)]