20657440

素因数分解:

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

素因数の和:170

約数の個数: 96

約数和(自身を含む): 51819264

約数和(自身を除く): 31161824

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 47, 67, 80, 82, 94, 134, 160, 164, 188, 205, 235, 268, 328, 335, 376, 410, 470, 536, 656, 670, 752, 820, 940, 1072, 1312, 1340, 1504, 1640, 1880, 1927, 2144, 2680, 2747, 3149, 3280, 3760, 3854, 5360, 5494, 6298, 6560, 7520, 7708, 9635, 10720, 10988, 12596, 13735, 15416, 15745, 19270, 21976, 25192, 27470, 30832, 31490, 38540, 43952, 50384, 54940, 61664, 62980, 77080, 87904, 100768, 109880, 125960, 129109, 154160, 219760, 251920, 258218, 308320, 439520, 503840, 516436, 645545, 1032872, 1291090, 2065744, 2582180, 4131488, 5164360, 10328720, 20657440]

約数ペア:

[(1, 20657440), (2, 10328720), (4, 5164360), (5, 4131488), (8, 2582180), (10, 2065744), (16, 1291090), (20, 1032872), (32, 645545), (40, 516436), (41, 503840), (47, 439520), (67, 308320), (80, 258218), (82, 251920), (94, 219760), (134, 154160), (160, 129109), (164, 125960), (188, 109880), (205, 100768), (235, 87904), (268, 77080), (328, 62980), (335, 61664), (376, 54940), (410, 50384), (470, 43952), (536, 38540), (656, 31490), (670, 30832), (752, 27470), (820, 25192), (940, 21976), (1072, 19270), (1312, 15745), (1340, 15416), (1504, 13735), (1640, 12596), (1880, 10988), (1927, 10720), (2144, 9635), (2680, 7708), (2747, 7520), (3149, 6560), (3280, 6298), (3760, 5494), (3854, 5360)]