21132671

素因数分解:

$7^2\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{157}}^1$

素因数の和:279

約数の個数: 24

約数和(自身を含む): 25721136

約数和(自身を除く): 4588465

約数列:

[1, 7, 41, 49, 67, 157, 287, 469, 1099, 2009, 2747, 3283, 6437, 7693, 10519, 19229, 45059, 73633, 134603, 315413, 431279, 515431, 3018953, 21132671]

約数ペア:

[(1, 21132671), (7, 3018953), (41, 515431), (49, 431279), (67, 315413), (157, 134603), (287, 73633), (469, 45059), (1099, 19229), (2009, 10519), (2747, 7693), (3283, 6437)]