21281960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{263}}^1$

素因数の和:315

約数の個数: 96

約数和(自身を含む): 58354560

約数和(自身を除く): 37072600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 20, 28, 34, 35, 40, 56, 68, 70, 85, 119, 136, 140, 170, 238, 263, 280, 289, 340, 476, 526, 578, 595, 680, 952, 1052, 1156, 1190, 1315, 1445, 1841, 2023, 2104, 2312, 2380, 2630, 2890, 3682, 4046, 4471, 4760, 5260, 5780, 7364, 8092, 8942, 9205, 10115, 10520, 11560, 14728, 16184, 17884, 18410, 20230, 22355, 31297, 35768, 36820, 40460, 44710, 62594, 73640, 76007, 80920, 89420, 125188, 152014, 156485, 178840, 250376, 304028, 312970, 380035, 532049, 608056, 625940, 760070, 1064098, 1251880, 1520140, 2128196, 2660245, 3040280, 4256392, 5320490, 10640980, 21281960]

約数ペア:

[(1, 21281960), (2, 10640980), (4, 5320490), (5, 4256392), (7, 3040280), (8, 2660245), (10, 2128196), (14, 1520140), (17, 1251880), (20, 1064098), (28, 760070), (34, 625940), (35, 608056), (40, 532049), (56, 380035), (68, 312970), (70, 304028), (85, 250376), (119, 178840), (136, 156485), (140, 152014), (170, 125188), (238, 89420), (263, 80920), (280, 76007), (289, 73640), (340, 62594), (476, 44710), (526, 40460), (578, 36820), (595, 35768), (680, 31297), (952, 22355), (1052, 20230), (1156, 18410), (1190, 17884), (1315, 16184), (1445, 14728), (1841, 11560), (2023, 10520), (2104, 10115), (2312, 9205), (2380, 8942), (2630, 8092), (2890, 7364), (3682, 5780), (4046, 5260), (4471, 4760)]