20875281

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{463}}^1$

素因数の和:605

約数の個数: 32

約数和(自身を含む): 33853440

約数和(自身を除く): 12978159

約数列:

[1, 3, 7, 19, 21, 57, 113, 133, 339, 399, 463, 791, 1389, 2147, 2373, 3241, 6441, 8797, 9723, 15029, 26391, 45087, 52319, 61579, 156957, 184737, 366233, 994061, 1098699, 2982183, 6958427, 20875281]

約数ペア:

[(1, 20875281), (3, 6958427), (7, 2982183), (19, 1098699), (21, 994061), (57, 366233), (113, 184737), (133, 156957), (339, 61579), (399, 52319), (463, 45087), (791, 26391), (1389, 15029), (2147, 9723), (2373, 8797), (3241, 6441)]