20426140

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{1097}}^1$

素因数の和:1139

約数の個数: 72

約数和(自身を含む): 52572240

約数和(自身を除く): 32146100

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 49, 70, 76, 95, 98, 133, 140, 190, 196, 245, 266, 380, 490, 532, 665, 931, 980, 1097, 1330, 1862, 2194, 2660, 3724, 4388, 4655, 5485, 7679, 9310, 10970, 15358, 18620, 20843, 21940, 30716, 38395, 41686, 53753, 76790, 83372, 104215, 107506, 145901, 153580, 208430, 215012, 268765, 291802, 416860, 537530, 583604, 729505, 1021307, 1075060, 1459010, 2042614, 2918020, 4085228, 5106535, 10213070, 20426140]

約数ペア:

[(1, 20426140), (2, 10213070), (4, 5106535), (5, 4085228), (7, 2918020), (10, 2042614), (14, 1459010), (19, 1075060), (20, 1021307), (28, 729505), (35, 583604), (38, 537530), (49, 416860), (70, 291802), (76, 268765), (95, 215012), (98, 208430), (133, 153580), (140, 145901), (190, 107506), (196, 104215), (245, 83372), (266, 76790), (380, 53753), (490, 41686), (532, 38395), (665, 30716), (931, 21940), (980, 20843), (1097, 18620), (1330, 15358), (1862, 10970), (2194, 9310), (2660, 7679), (3724, 5485), (4388, 4655)]