20118980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{1097}}^1$

素因数の和:1244

約数の個数: 48

約数和(自身を含む): 48698496

約数和(自身を除く): 28579516

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 131, 140, 262, 524, 655, 917, 1097, 1310, 1834, 2194, 2620, 3668, 4388, 4585, 5485, 7679, 9170, 10970, 15358, 18340, 21940, 30716, 38395, 76790, 143707, 153580, 287414, 574828, 718535, 1005949, 1437070, 2011898, 2874140, 4023796, 5029745, 10059490, 20118980]

約数ペア:

[(1, 20118980), (2, 10059490), (4, 5029745), (5, 4023796), (7, 2874140), (10, 2011898), (14, 1437070), (20, 1005949), (28, 718535), (35, 574828), (70, 287414), (131, 153580), (140, 143707), (262, 76790), (524, 38395), (655, 30716), (917, 21940), (1097, 18340), (1310, 15358), (1834, 10970), (2194, 9170), (2620, 7679), (3668, 5485), (4388, 4585)]