21538251

素因数分解:

$3^3\times 7^1\times {\mathrm{83}}^1\times {\mathrm{1373}}^1$

素因数の和:1472

約数の個数: 32

約数和(自身を含む): 36933120

約数和(自身を除く): 15394869

約数列:

[1, 3, 7, 9, 21, 27, 63, 83, 189, 249, 581, 747, 1373, 1743, 2241, 4119, 5229, 9611, 12357, 15687, 28833, 37071, 86499, 113959, 259497, 341877, 797713, 1025631, 2393139, 3076893, 7179417, 21538251]

約数ペア:

[(1, 21538251), (3, 7179417), (7, 3076893), (9, 2393139), (21, 1025631), (27, 797713), (63, 341877), (83, 259497), (189, 113959), (249, 86499), (581, 37071), (747, 28833), (1373, 15687), (1743, 12357), (2241, 9611), (4119, 5229)]