20494160

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{139}}^1$

素因数の和:268

約数の個数: 80

約数和(自身を含む): 51038400

約数和(自身を除く): 30544240

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 97, 139, 152, 190, 194, 278, 304, 380, 388, 485, 556, 695, 760, 776, 970, 1112, 1390, 1520, 1552, 1843, 1940, 2224, 2641, 2780, 3686, 3880, 5282, 5560, 7372, 7760, 9215, 10564, 11120, 13205, 13483, 14744, 18430, 21128, 26410, 26966, 29488, 36860, 42256, 52820, 53932, 67415, 73720, 105640, 107864, 134830, 147440, 211280, 215728, 256177, 269660, 512354, 539320, 1024708, 1078640, 1280885, 2049416, 2561770, 4098832, 5123540, 10247080, 20494160]

約数ペア:

[(1, 20494160), (2, 10247080), (4, 5123540), (5, 4098832), (8, 2561770), (10, 2049416), (16, 1280885), (19, 1078640), (20, 1024708), (38, 539320), (40, 512354), (76, 269660), (80, 256177), (95, 215728), (97, 211280), (139, 147440), (152, 134830), (190, 107864), (194, 105640), (278, 73720), (304, 67415), (380, 53932), (388, 52820), (485, 42256), (556, 36860), (695, 29488), (760, 26966), (776, 26410), (970, 21128), (1112, 18430), (1390, 14744), (1520, 13483), (1552, 13205), (1843, 11120), (1940, 10564), (2224, 9215), (2641, 7760), (2780, 7372), (3686, 5560), (3880, 5282)]