28487620

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{709}}^1$

素因数の和:773

約数の個数: 72

約数和(自身を含む): 71389080

約数和(自身を除く): 42901460

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 49, 70, 82, 98, 140, 164, 196, 205, 245, 287, 410, 490, 574, 709, 820, 980, 1148, 1418, 1435, 2009, 2836, 2870, 3545, 4018, 4963, 5740, 7090, 8036, 9926, 10045, 14180, 19852, 20090, 24815, 29069, 34741, 40180, 49630, 58138, 69482, 99260, 116276, 138964, 145345, 173705, 203483, 290690, 347410, 406966, 581380, 694820, 813932, 1017415, 1424381, 2034830, 2848762, 4069660, 5697524, 7121905, 14243810, 28487620]

約数ペア:

[(1, 28487620), (2, 14243810), (4, 7121905), (5, 5697524), (7, 4069660), (10, 2848762), (14, 2034830), (20, 1424381), (28, 1017415), (35, 813932), (41, 694820), (49, 581380), (70, 406966), (82, 347410), (98, 290690), (140, 203483), (164, 173705), (196, 145345), (205, 138964), (245, 116276), (287, 99260), (410, 69482), (490, 58138), (574, 49630), (709, 40180), (820, 34741), (980, 29069), (1148, 24815), (1418, 20090), (1435, 19852), (2009, 14180), (2836, 10045), (2870, 9926), (3545, 8036), (4018, 7090), (4963, 5740)]