641556

素因数分解:

$2^2\times 3^2\times {\mathrm{71}}^1\times {\mathrm{251}}^1$

素因数の和:332

約数の個数: 36

約数和(自身を含む): 1651104

約数和(自身を除く): 1009548

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 71, 142, 213, 251, 284, 426, 502, 639, 753, 852, 1004, 1278, 1506, 2259, 2556, 3012, 4518, 9036, 17821, 35642, 53463, 71284, 106926, 160389, 213852, 320778, 641556]

約数ペア:

[(1, 641556), (2, 320778), (3, 213852), (4, 160389), (6, 106926), (9, 71284), (12, 53463), (18, 35642), (36, 17821), (71, 9036), (142, 4518), (213, 3012), (251, 2556), (284, 2259), (426, 1506), (502, 1278), (639, 1004), (753, 852)]