21178240

素因数分解:

$2^7\times 5^1\times {\mathrm{33091}}^1$

素因数の和:33110

約数の個数: 32

約数和(自身を含む): 50630760

約数和(自身を除く): 29452520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 33091, 66182, 132364, 165455, 264728, 330910, 529456, 661820, 1058912, 1323640, 2117824, 2647280, 4235648, 5294560, 10589120, 21178240]

約数ペア:

[(1, 21178240), (2, 10589120), (4, 5294560), (5, 4235648), (8, 2647280), (10, 2117824), (16, 1323640), (20, 1058912), (32, 661820), (40, 529456), (64, 330910), (80, 264728), (128, 165455), (160, 132364), (320, 66182), (640, 33091)]