398860

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1$

素因数の和:71

約数の個数: 72

約数和(自身を含む): 1091664

約数和(自身を除く): 692804

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 37, 44, 49, 55, 70, 74, 77, 98, 110, 140, 148, 154, 185, 196, 220, 245, 259, 308, 370, 385, 407, 490, 518, 539, 740, 770, 814, 980, 1036, 1078, 1295, 1540, 1628, 1813, 2035, 2156, 2590, 2695, 2849, 3626, 4070, 5180, 5390, 5698, 7252, 8140, 9065, 10780, 11396, 14245, 18130, 19943, 28490, 36260, 39886, 56980, 79772, 99715, 199430, 398860]

約数ペア:

[(1, 398860), (2, 199430), (4, 99715), (5, 79772), (7, 56980), (10, 39886), (11, 36260), (14, 28490), (20, 19943), (22, 18130), (28, 14245), (35, 11396), (37, 10780), (44, 9065), (49, 8140), (55, 7252), (70, 5698), (74, 5390), (77, 5180), (98, 4070), (110, 3626), (140, 2849), (148, 2695), (154, 2590), (185, 2156), (196, 2035), (220, 1813), (245, 1628), (259, 1540), (308, 1295), (370, 1078), (385, 1036), (407, 980), (490, 814), (518, 770), (539, 740)]