21376216

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{2099}}^1$

素因数の和:2191

約数の個数: 32

約数和(自身を含む): 42840000

約数和(自身を除く): 21463784

約数列:

[1, 2, 4, 8, 19, 38, 67, 76, 134, 152, 268, 536, 1273, 2099, 2546, 4198, 5092, 8396, 10184, 16792, 39881, 79762, 140633, 159524, 281266, 319048, 562532, 1125064, 2672027, 5344054, 10688108, 21376216]

約数ペア:

[(1, 21376216), (2, 10688108), (4, 5344054), (8, 2672027), (19, 1125064), (38, 562532), (67, 319048), (76, 281266), (134, 159524), (152, 140633), (268, 79762), (536, 39881), (1273, 16792), (2099, 10184), (2546, 8396), (4198, 5092)]