21368980

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{431}}^1$

素因数の和:544

約数の個数: 48

約数和(自身を含む): 46884096

約数和(自身を除く): 25515116

約数列:

[1, 2, 4, 5, 10, 20, 37, 67, 74, 134, 148, 185, 268, 335, 370, 431, 670, 740, 862, 1340, 1724, 2155, 2479, 4310, 4958, 8620, 9916, 12395, 15947, 24790, 28877, 31894, 49580, 57754, 63788, 79735, 115508, 144385, 159470, 288770, 318940, 577540, 1068449, 2136898, 4273796, 5342245, 10684490, 21368980]

約数ペア:

[(1, 21368980), (2, 10684490), (4, 5342245), (5, 4273796), (10, 2136898), (20, 1068449), (37, 577540), (67, 318940), (74, 288770), (134, 159470), (148, 144385), (185, 115508), (268, 79735), (335, 63788), (370, 57754), (431, 49580), (670, 31894), (740, 28877), (862, 24790), (1340, 15947), (1724, 12395), (2155, 9916), (2479, 8620), (4310, 4958)]