20561800

素因数分解:

$2^3\times 5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{773}}^1$

素因数の和:815

約数の個数: 96

約数和(自身を含む): 57585600

約数和(自身を除く): 37023800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 25, 28, 35, 38, 40, 50, 56, 70, 76, 95, 100, 133, 140, 152, 175, 190, 200, 266, 280, 350, 380, 475, 532, 665, 700, 760, 773, 950, 1064, 1330, 1400, 1546, 1900, 2660, 3092, 3325, 3800, 3865, 5320, 5411, 6184, 6650, 7730, 10822, 13300, 14687, 15460, 19325, 21644, 26600, 27055, 29374, 30920, 38650, 43288, 54110, 58748, 73435, 77300, 102809, 108220, 117496, 135275, 146870, 154600, 205618, 216440, 270550, 293740, 367175, 411236, 514045, 541100, 587480, 734350, 822472, 1028090, 1082200, 1468700, 2056180, 2570225, 2937400, 4112360, 5140450, 10280900, 20561800]

約数ペア:

[(1, 20561800), (2, 10280900), (4, 5140450), (5, 4112360), (7, 2937400), (8, 2570225), (10, 2056180), (14, 1468700), (19, 1082200), (20, 1028090), (25, 822472), (28, 734350), (35, 587480), (38, 541100), (40, 514045), (50, 411236), (56, 367175), (70, 293740), (76, 270550), (95, 216440), (100, 205618), (133, 154600), (140, 146870), (152, 135275), (175, 117496), (190, 108220), (200, 102809), (266, 77300), (280, 73435), (350, 58748), (380, 54110), (475, 43288), (532, 38650), (665, 30920), (700, 29374), (760, 27055), (773, 26600), (950, 21644), (1064, 19325), (1330, 15460), (1400, 14687), (1546, 13300), (1900, 10822), (2660, 7730), (3092, 6650), (3325, 6184), (3800, 5411), (3865, 5320)]