21760193

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{83}}^1$

素因数の和:213

約数の個数: 32

約数和(自身を含む): 28148736

約数和(自身を除く): 6388543

約数列:

[1, 7, 13, 43, 67, 83, 91, 301, 469, 559, 581, 871, 1079, 2881, 3569, 3913, 5561, 6097, 7553, 20167, 24983, 37453, 38927, 46397, 72293, 239123, 262171, 324779, 506051, 1673861, 3108599, 21760193]

約数ペア:

[(1, 21760193), (7, 3108599), (13, 1673861), (43, 506051), (67, 324779), (83, 262171), (91, 239123), (301, 72293), (469, 46397), (559, 38927), (581, 37453), (871, 24983), (1079, 20167), (2881, 7553), (3569, 6097), (3913, 5561)]