8401720

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{109}}^1$

素因数の和:208

約数の個数: 64

約数和(自身を含む): 19958400

約数和(自身を除く): 11556680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 47, 82, 94, 109, 164, 188, 205, 218, 235, 328, 376, 410, 436, 470, 545, 820, 872, 940, 1090, 1640, 1880, 1927, 2180, 3854, 4360, 4469, 5123, 7708, 8938, 9635, 10246, 15416, 17876, 19270, 20492, 22345, 25615, 35752, 38540, 40984, 44690, 51230, 77080, 89380, 102460, 178760, 204920, 210043, 420086, 840172, 1050215, 1680344, 2100430, 4200860, 8401720]

約数ペア:

[(1, 8401720), (2, 4200860), (4, 2100430), (5, 1680344), (8, 1050215), (10, 840172), (20, 420086), (40, 210043), (41, 204920), (47, 178760), (82, 102460), (94, 89380), (109, 77080), (164, 51230), (188, 44690), (205, 40984), (218, 38540), (235, 35752), (328, 25615), (376, 22345), (410, 20492), (436, 19270), (470, 17876), (545, 15416), (820, 10246), (872, 9635), (940, 8938), (1090, 7708), (1640, 5123), (1880, 4469), (1927, 4360), (2180, 3854)]