21222920

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{7919}}^1$

素因数の和:7997

約数の個数: 32

約数和(自身を含む): 48470400

約数和(自身を除く): 27247480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 268, 335, 536, 670, 1340, 2680, 7919, 15838, 31676, 39595, 63352, 79190, 158380, 316760, 530573, 1061146, 2122292, 2652865, 4244584, 5305730, 10611460, 21222920]

約数ペア:

[(1, 21222920), (2, 10611460), (4, 5305730), (5, 4244584), (8, 2652865), (10, 2122292), (20, 1061146), (40, 530573), (67, 316760), (134, 158380), (268, 79190), (335, 63352), (536, 39595), (670, 31676), (1340, 15838), (2680, 7919)]