19901560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{113}}^1$

素因数の和:185

約数の個数: 128

約数和(自身を含む): 56142720

約数和(自身を除く): 36241160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 20, 28, 34, 35, 37, 40, 56, 68, 70, 74, 85, 113, 119, 136, 140, 148, 170, 185, 226, 238, 259, 280, 296, 340, 370, 452, 476, 518, 565, 595, 629, 680, 740, 791, 904, 952, 1036, 1130, 1190, 1258, 1295, 1480, 1582, 1921, 2072, 2260, 2380, 2516, 2590, 3145, 3164, 3842, 3955, 4181, 4403, 4520, 4760, 5032, 5180, 6290, 6328, 7684, 7910, 8362, 8806, 9605, 10360, 12580, 13447, 15368, 15820, 16724, 17612, 19210, 20905, 22015, 25160, 26894, 29267, 31640, 33448, 35224, 38420, 41810, 44030, 53788, 58534, 67235, 71077, 76840, 83620, 88060, 107576, 117068, 134470, 142154, 146335, 167240, 176120, 234136, 268940, 284308, 292670, 355385, 497539, 537880, 568616, 585340, 710770, 995078, 1170680, 1421540, 1990156, 2487695, 2843080, 3980312, 4975390, 9950780, 19901560]

約数ペア:

[(1, 19901560), (2, 9950780), (4, 4975390), (5, 3980312), (7, 2843080), (8, 2487695), (10, 1990156), (14, 1421540), (17, 1170680), (20, 995078), (28, 710770), (34, 585340), (35, 568616), (37, 537880), (40, 497539), (56, 355385), (68, 292670), (70, 284308), (74, 268940), (85, 234136), (113, 176120), (119, 167240), (136, 146335), (140, 142154), (148, 134470), (170, 117068), (185, 107576), (226, 88060), (238, 83620), (259, 76840), (280, 71077), (296, 67235), (340, 58534), (370, 53788), (452, 44030), (476, 41810), (518, 38420), (565, 35224), (595, 33448), (629, 31640), (680, 29267), (740, 26894), (791, 25160), (904, 22015), (952, 20905), (1036, 19210), (1130, 17612), (1190, 16724), (1258, 15820), (1295, 15368), (1480, 13447), (1582, 12580), (1921, 10360), (2072, 9605), (2260, 8806), (2380, 8362), (2516, 7910), (2590, 7684), (3145, 6328), (3164, 6290), (3842, 5180), (3955, 5032), (4181, 4760), (4403, 4520)]