21856772

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{241}}^1$

素因数の和:372

約数の個数: 48

約数和(自身を含む): 45534720

約数和(自身を除く): 23677948

約数列:

[1, 2, 4, 7, 14, 28, 41, 79, 82, 158, 164, 241, 287, 316, 482, 553, 574, 964, 1106, 1148, 1687, 2212, 3239, 3374, 6478, 6748, 9881, 12956, 19039, 19762, 22673, 38078, 39524, 45346, 69167, 76156, 90692, 133273, 138334, 266546, 276668, 533092, 780599, 1561198, 3122396, 5464193, 10928386, 21856772]

約数ペア:

[(1, 21856772), (2, 10928386), (4, 5464193), (7, 3122396), (14, 1561198), (28, 780599), (41, 533092), (79, 276668), (82, 266546), (158, 138334), (164, 133273), (241, 90692), (287, 76156), (316, 69167), (482, 45346), (553, 39524), (574, 38078), (964, 22673), (1106, 19762), (1148, 19039), (1687, 12956), (2212, 9881), (3239, 6748), (3374, 6478)]