20658890

素因数分解:

$2^1\times 5^1\times 7^3\times {\mathrm{19}}^1\times {\mathrm{317}}^1$

素因数の和:364

約数の個数: 64

約数和(自身を含む): 45792000

約数和(自身を除く): 25133110

約数列:

[1, 2, 5, 7, 10, 14, 19, 35, 38, 49, 70, 95, 98, 133, 190, 245, 266, 317, 343, 490, 634, 665, 686, 931, 1330, 1585, 1715, 1862, 2219, 3170, 3430, 4438, 4655, 6023, 6517, 9310, 11095, 12046, 13034, 15533, 22190, 30115, 31066, 32585, 42161, 60230, 65170, 77665, 84322, 108731, 155330, 210805, 217462, 295127, 421610, 543655, 590254, 1087310, 1475635, 2065889, 2951270, 4131778, 10329445, 20658890]

約数ペア:

[(1, 20658890), (2, 10329445), (5, 4131778), (7, 2951270), (10, 2065889), (14, 1475635), (19, 1087310), (35, 590254), (38, 543655), (49, 421610), (70, 295127), (95, 217462), (98, 210805), (133, 155330), (190, 108731), (245, 84322), (266, 77665), (317, 65170), (343, 60230), (490, 42161), (634, 32585), (665, 31066), (686, 30115), (931, 22190), (1330, 15533), (1585, 13034), (1715, 12046), (1862, 11095), (2219, 9310), (3170, 6517), (3430, 6023), (4438, 4655)]