18978416

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{163}}^1\times {\mathrm{383}}^1$

素因数の和:573

約数の個数: 40

約数和(自身を含む): 39045120

約数和(自身を除く): 20066704

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 163, 304, 326, 383, 652, 766, 1304, 1532, 2608, 3064, 3097, 6128, 6194, 7277, 12388, 14554, 24776, 29108, 49552, 58216, 62429, 116432, 124858, 249716, 499432, 998864, 1186151, 2372302, 4744604, 9489208, 18978416]

約数ペア:

[(1, 18978416), (2, 9489208), (4, 4744604), (8, 2372302), (16, 1186151), (19, 998864), (38, 499432), (76, 249716), (152, 124858), (163, 116432), (304, 62429), (326, 58216), (383, 49552), (652, 29108), (766, 24776), (1304, 14554), (1532, 12388), (2608, 7277), (3064, 6194), (3097, 6128)]