21900415

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{229}}^1\times {\mathrm{617}}^1$

素因数の和:882

約数の個数: 16

約数和(自身を含む): 27290880

約数和(自身を除く): 5390465

約数列:

[1, 5, 31, 155, 229, 617, 1145, 3085, 7099, 19127, 35495, 95635, 141293, 706465, 4380083, 21900415]

約数ペア:

[(1, 21900415), (5, 4380083), (31, 706465), (155, 141293), (229, 95635), (617, 35495), (1145, 19127), (3085, 7099)]