19960920

素因数分解:

$2^3\times 3^2\times 5^1\times 7^1\times {\mathrm{89}}^2$

素因数の和:202

約数の個数: 144

約数和(自身を含む): 74982960

約数和(自身を除く): 55022040

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 56, 60, 63, 70, 72, 84, 89, 90, 105, 120, 126, 140, 168, 178, 180, 210, 252, 267, 280, 315, 356, 360, 420, 445, 504, 534, 623, 630, 712, 801, 840, 890, 1068, 1246, 1260, 1335, 1602, 1780, 1869, 2136, 2492, 2520, 2670, 3115, 3204, 3560, 3738, 4005, 4984, 5340, 5607, 6230, 6408, 7476, 7921, 8010, 9345, 10680, 11214, 12460, 14952, 15842, 16020, 18690, 22428, 23763, 24920, 28035, 31684, 32040, 37380, 39605, 44856, 47526, 55447, 56070, 63368, 71289, 74760, 79210, 95052, 110894, 112140, 118815, 142578, 158420, 166341, 190104, 221788, 224280, 237630, 277235, 285156, 316840, 332682, 356445, 443576, 475260, 499023, 554470, 570312, 665364, 712890, 831705, 950520, 998046, 1108940, 1330728, 1425780, 1663410, 1996092, 2217880, 2495115, 2851560, 3326820, 3992184, 4990230, 6653640, 9980460, 19960920]

約数ペア:

[(1, 19960920), (2, 9980460), (3, 6653640), (4, 4990230), (5, 3992184), (6, 3326820), (7, 2851560), (8, 2495115), (9, 2217880), (10, 1996092), (12, 1663410), (14, 1425780), (15, 1330728), (18, 1108940), (20, 998046), (21, 950520), (24, 831705), (28, 712890), (30, 665364), (35, 570312), (36, 554470), (40, 499023), (42, 475260), (45, 443576), (56, 356445), (60, 332682), (63, 316840), (70, 285156), (72, 277235), (84, 237630), (89, 224280), (90, 221788), (105, 190104), (120, 166341), (126, 158420), (140, 142578), (168, 118815), (178, 112140), (180, 110894), (210, 95052), (252, 79210), (267, 74760), (280, 71289), (315, 63368), (356, 56070), (360, 55447), (420, 47526), (445, 44856), (504, 39605), (534, 37380), (623, 32040), (630, 31684), (712, 28035), (801, 24920), (840, 23763), (890, 22428), (1068, 18690), (1246, 16020), (1260, 15842), (1335, 14952), (1602, 12460), (1780, 11214), (1869, 10680), (2136, 9345), (2492, 8010), (2520, 7921), (2670, 7476), (3115, 6408), (3204, 6230), (3560, 5607), (3738, 5340), (4005, 4984)]