20796440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{257}}^1$

素因数の和:309

約数の個数: 96

約数和(自身を含む): 57028320

約数和(自身を除く): 36231880

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, 257, 280, 289, 340, 476, 514, 578, 595, 680, 952, 1028, 1156, 1190, 1285, 1445, 1799, 2023, 2056, 2312, 2380, 2570, 2890, 3598, 4046, 4369, 4760, 5140, 5780, 7196, 8092, 8738, 8995, 10115, 10280, 11560, 14392, 16184, 17476, 17990, 20230, 21845, 30583, 34952, 35980, 40460, 43690, 61166, 71960, 74273, 80920, 87380, 122332, 148546, 152915, 174760, 244664, 297092, 305830, 371365, 519911, 594184, 611660, 742730, 1039822, 1223320, 1485460, 2079644, 2599555, 2970920, 4159288, 5199110, 10398220, 20796440]

約数ペア:

[(1, 20796440), (2, 10398220), (4, 5199110), (5, 4159288), (7, 2970920), (8, 2599555), (10, 2079644), (14, 1485460), (17, 1223320), (20, 1039822), (28, 742730), (34, 611660), (35, 594184), (40, 519911), (56, 371365), (68, 305830), (70, 297092), (85, 244664), (119, 174760), (136, 152915), (140, 148546), (170, 122332), (238, 87380), (257, 80920), (280, 74273), (289, 71960), (340, 61166), (476, 43690), (514, 40460), (578, 35980), (595, 34952), (680, 30583), (952, 21845), (1028, 20230), (1156, 17990), (1190, 17476), (1285, 16184), (1445, 14392), (1799, 11560), (2023, 10280), (2056, 10115), (2312, 8995), (2380, 8738), (2570, 8092), (2890, 7196), (3598, 5780), (4046, 5140), (4369, 4760)]