21986020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{1619}}^1$

素因数の和:1732

約数の個数: 48

約数和(自身を含む): 53343360

約数和(自身を除く): 31357340

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 97, 140, 194, 388, 485, 679, 970, 1358, 1619, 1940, 2716, 3238, 3395, 6476, 6790, 8095, 11333, 13580, 16190, 22666, 32380, 45332, 56665, 113330, 157043, 226660, 314086, 628172, 785215, 1099301, 1570430, 2198602, 3140860, 4397204, 5496505, 10993010, 21986020]

約数ペア:

[(1, 21986020), (2, 10993010), (4, 5496505), (5, 4397204), (7, 3140860), (10, 2198602), (14, 1570430), (20, 1099301), (28, 785215), (35, 628172), (70, 314086), (97, 226660), (140, 157043), (194, 113330), (388, 56665), (485, 45332), (679, 32380), (970, 22666), (1358, 16190), (1619, 13580), (1940, 11333), (2716, 8095), (3238, 6790), (3395, 6476)]