20808821908

素因数分解:

$2^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{167}}^1\times {\mathrm{72953}}^1$

素因数の和:73192

約数の個数: 48

約数和(自身を含む): 42553776384

約数和(自身を除く): 21744954476

約数列:

[1, 2, 4, 7, 14, 28, 61, 122, 167, 244, 334, 427, 668, 854, 1169, 1708, 2338, 4676, 10187, 20374, 40748, 71309, 72953, 142618, 145906, 285236, 291812, 510671, 1021342, 2042684, 4450133, 8900266, 12183151, 17800532, 24366302, 31150931, 48732604, 62301862, 85282057, 124603724, 170564114, 341128228, 743172211, 1486344422, 2972688844, 5202205477, 10404410954, 20808821908]

約数ペア:

[(1, 20808821908), (2, 10404410954), (4, 5202205477), (7, 2972688844), (14, 1486344422), (28, 743172211), (61, 341128228), (122, 170564114), (167, 124603724), (244, 85282057), (334, 62301862), (427, 48732604), (668, 31150931), (854, 24366302), (1169, 17800532), (1708, 12183151), (2338, 8900266), (4676, 4450133), (10187, 2042684), (20374, 1021342), (40748, 510671), (71309, 291812), (72953, 285236), (142618, 145906)]