20394540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{3907}}^1$

素因数の和:3951

約数の個数: 72

約数和(自身を含む): 64013040

約数和(自身を除く): 43618500

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 29, 30, 36, 45, 58, 60, 87, 90, 116, 145, 174, 180, 261, 290, 348, 435, 522, 580, 870, 1044, 1305, 1740, 2610, 3907, 5220, 7814, 11721, 15628, 19535, 23442, 35163, 39070, 46884, 58605, 70326, 78140, 113303, 117210, 140652, 175815, 226606, 234420, 339909, 351630, 453212, 566515, 679818, 703260, 1019727, 1133030, 1359636, 1699545, 2039454, 2266060, 3399090, 4078908, 5098635, 6798180, 10197270, 20394540]

約数ペア:

[(1, 20394540), (2, 10197270), (3, 6798180), (4, 5098635), (5, 4078908), (6, 3399090), (9, 2266060), (10, 2039454), (12, 1699545), (15, 1359636), (18, 1133030), (20, 1019727), (29, 703260), (30, 679818), (36, 566515), (45, 453212), (58, 351630), (60, 339909), (87, 234420), (90, 226606), (116, 175815), (145, 140652), (174, 117210), (180, 113303), (261, 78140), (290, 70326), (348, 58605), (435, 46884), (522, 39070), (580, 35163), (870, 23442), (1044, 19535), (1305, 15628), (1740, 11721), (2610, 7814), (3907, 5220)]