21618745

素因数分解:

$5^1\times {\mathrm{79}}^1\times {\mathrm{229}}^1\times {\mathrm{239}}^1$

素因数の和:552

約数の個数: 16

約数和(自身を含む): 26496000

約数和(自身を除く): 4877255

約数列:

[1, 5, 79, 229, 239, 395, 1145, 1195, 18091, 18881, 54731, 90455, 94405, 273655, 4323749, 21618745]

約数ペア:

[(1, 21618745), (5, 4323749), (79, 273655), (229, 94405), (239, 90455), (395, 54731), (1145, 18881), (1195, 18091)]