17640980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{47}}^1\times {\mathrm{383}}^1$

素因数の和:453

約数の個数: 72

約数和(自身を含む): 44126208

約数和(自身を除く): 26485228

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 47, 49, 70, 94, 98, 140, 188, 196, 235, 245, 329, 383, 470, 490, 658, 766, 940, 980, 1316, 1532, 1645, 1915, 2303, 2681, 3290, 3830, 4606, 5362, 6580, 7660, 9212, 10724, 11515, 13405, 18001, 18767, 23030, 26810, 36002, 37534, 46060, 53620, 72004, 75068, 90005, 93835, 126007, 180010, 187670, 252014, 360020, 375340, 504028, 630035, 882049, 1260070, 1764098, 2520140, 3528196, 4410245, 8820490, 17640980]

約数ペア:

[(1, 17640980), (2, 8820490), (4, 4410245), (5, 3528196), (7, 2520140), (10, 1764098), (14, 1260070), (20, 882049), (28, 630035), (35, 504028), (47, 375340), (49, 360020), (70, 252014), (94, 187670), (98, 180010), (140, 126007), (188, 93835), (196, 90005), (235, 75068), (245, 72004), (329, 53620), (383, 46060), (470, 37534), (490, 36002), (658, 26810), (766, 23030), (940, 18767), (980, 18001), (1316, 13405), (1532, 11515), (1645, 10724), (1915, 9212), (2303, 7660), (2681, 6580), (3290, 5362), (3830, 4606)]