20043940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{113}}^1\times {\mathrm{181}}^1$

素因数の和:317

約数の個数: 72

約数和(自身を含む): 49670712

約数和(自身を除く): 29626772

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 113, 140, 181, 196, 226, 245, 362, 452, 490, 565, 724, 791, 905, 980, 1130, 1267, 1582, 1810, 2260, 2534, 3164, 3620, 3955, 5068, 5537, 6335, 7910, 8869, 11074, 12670, 15820, 17738, 20453, 22148, 25340, 27685, 35476, 40906, 44345, 55370, 81812, 88690, 102265, 110740, 143171, 177380, 204530, 286342, 409060, 572684, 715855, 1002197, 1431710, 2004394, 2863420, 4008788, 5010985, 10021970, 20043940]

約数ペア:

[(1, 20043940), (2, 10021970), (4, 5010985), (5, 4008788), (7, 2863420), (10, 2004394), (14, 1431710), (20, 1002197), (28, 715855), (35, 572684), (49, 409060), (70, 286342), (98, 204530), (113, 177380), (140, 143171), (181, 110740), (196, 102265), (226, 88690), (245, 81812), (362, 55370), (452, 44345), (490, 40906), (565, 35476), (724, 27685), (791, 25340), (905, 22148), (980, 20453), (1130, 17738), (1267, 15820), (1582, 12670), (1810, 11074), (2260, 8869), (2534, 7910), (3164, 6335), (3620, 5537), (3955, 5068)]