20781617717

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{179}}^1\times {\mathrm{491}}^1\times {\mathrm{1987}}^1$

素因数の和:2681

約数の個数: 32

約数和(自身を含む): 25352248320

約数和(自身を除く): 4570630603

約数列:

[1, 7, 17, 119, 179, 491, 1253, 1987, 3043, 3437, 8347, 13909, 21301, 33779, 58429, 87889, 236453, 355673, 615223, 975617, 1494113, 2489711, 6046441, 6829319, 10458791, 16585489, 42325087, 116098423, 174635443, 1222448101, 2968802531, 20781617717]

約数ペア:

[(1, 20781617717), (7, 2968802531), (17, 1222448101), (119, 174635443), (179, 116098423), (491, 42325087), (1253, 16585489), (1987, 10458791), (3043, 6829319), (3437, 6046441), (8347, 2489711), (13909, 1494113), (21301, 975617), (33779, 615223), (58429, 355673), (87889, 236453)]