21291540112

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{191}}^1\times {\mathrm{409831}}^1$

素因数の和:410047

約数の個数: 40

約数和(自身を含む): 43907761152

約数和(自身を除く): 22616221040

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 191, 272, 382, 764, 1528, 3056, 3247, 6494, 12988, 25976, 51952, 409831, 819662, 1639324, 3278648, 6557296, 6967127, 13934254, 27868508, 55737016, 78277721, 111474032, 156555442, 313110884, 626221768, 1252443536, 1330721257, 2661442514, 5322885028, 10645770056, 21291540112]

約数ペア:

[(1, 21291540112), (2, 10645770056), (4, 5322885028), (8, 2661442514), (16, 1330721257), (17, 1252443536), (34, 626221768), (68, 313110884), (136, 156555442), (191, 111474032), (272, 78277721), (382, 55737016), (764, 27868508), (1528, 13934254), (3056, 6967127), (3247, 6557296), (6494, 3278648), (12988, 1639324), (25976, 819662), (51952, 409831)]