28403980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1$

素因数の和:175

約数の個数: 96

約数和(自身を含む): 69092352

約数和(自身を除く): 40688372

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 44, 47, 55, 67, 82, 94, 110, 134, 164, 188, 205, 220, 235, 268, 335, 410, 451, 470, 517, 670, 737, 820, 902, 940, 1034, 1340, 1474, 1804, 1927, 2068, 2255, 2585, 2747, 2948, 3149, 3685, 3854, 4510, 5170, 5494, 6298, 7370, 7708, 9020, 9635, 10340, 10988, 12596, 13735, 14740, 15745, 19270, 21197, 27470, 30217, 31490, 34639, 38540, 42394, 54940, 60434, 62980, 69278, 84788, 105985, 120868, 129109, 138556, 151085, 173195, 211970, 258218, 302170, 346390, 423940, 516436, 604340, 645545, 692780, 1291090, 1420199, 2582180, 2840398, 5680796, 7100995, 14201990, 28403980]

約数ペア:

[(1, 28403980), (2, 14201990), (4, 7100995), (5, 5680796), (10, 2840398), (11, 2582180), (20, 1420199), (22, 1291090), (41, 692780), (44, 645545), (47, 604340), (55, 516436), (67, 423940), (82, 346390), (94, 302170), (110, 258218), (134, 211970), (164, 173195), (188, 151085), (205, 138556), (220, 129109), (235, 120868), (268, 105985), (335, 84788), (410, 69278), (451, 62980), (470, 60434), (517, 54940), (670, 42394), (737, 38540), (820, 34639), (902, 31490), (940, 30217), (1034, 27470), (1340, 21197), (1474, 19270), (1804, 15745), (1927, 14740), (2068, 13735), (2255, 12596), (2585, 10988), (2747, 10340), (2948, 9635), (3149, 9020), (3685, 7708), (3854, 7370), (4510, 6298), (5170, 5494)]