21121793

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{263}}^1$

素因数の和:437

約数の個数: 24

約数和(自身を含む): 27086400

約数和(自身を除く): 5964607

約数列:

[1, 7, 11, 49, 77, 149, 263, 539, 1043, 1639, 1841, 2893, 7301, 11473, 12887, 20251, 39187, 80311, 141757, 274309, 431057, 1920163, 3017399, 21121793]

約数ペア:

[(1, 21121793), (7, 3017399), (11, 1920163), (49, 431057), (77, 274309), (149, 141757), (263, 80311), (539, 39187), (1043, 20251), (1639, 12887), (1841, 11473), (2893, 7301)]