21357880

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{14431}}^1$

素因数の和:14479

約数の個数: 32

約数和(自身を含む): 49357440

約数和(自身を除く): 27999560

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 296, 370, 740, 1480, 14431, 28862, 57724, 72155, 115448, 144310, 288620, 533947, 577240, 1067894, 2135788, 2669735, 4271576, 5339470, 10678940, 21357880]

約数ペア:

[(1, 21357880), (2, 10678940), (4, 5339470), (5, 4271576), (8, 2669735), (10, 2135788), (20, 1067894), (37, 577240), (40, 533947), (74, 288620), (148, 144310), (185, 115448), (296, 72155), (370, 57724), (740, 28862), (1480, 14431)]