18821855

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1$

素因数の和:227

約数の個数: 32

約数和(自身を含む): 25498368

約数和(自身を除く): 6676513

約数列:

[1, 5, 13, 47, 61, 65, 101, 235, 305, 505, 611, 793, 1313, 2867, 3055, 3965, 4747, 6161, 6565, 14335, 23735, 30805, 37271, 61711, 80093, 186355, 289567, 308555, 400465, 1447835, 3764371, 18821855]

約数ペア:

[(1, 18821855), (5, 3764371), (13, 1447835), (47, 400465), (61, 308555), (65, 289567), (101, 186355), (235, 80093), (305, 61711), (505, 37271), (611, 30805), (793, 23735), (1313, 14335), (2867, 6565), (3055, 6161), (3965, 4747)]