19995261

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{367}}^1$

素因数の和:521

約数の個数: 32

約数和(自身を含む): 31653888

約数和(自身を除く): 11658627

約数列:

[1, 3, 11, 13, 33, 39, 127, 143, 367, 381, 429, 1101, 1397, 1651, 4037, 4191, 4771, 4953, 12111, 14313, 18161, 46609, 52481, 54483, 139827, 157443, 512699, 605917, 1538097, 1817751, 6665087, 19995261]

約数ペア:

[(1, 19995261), (3, 6665087), (11, 1817751), (13, 1538097), (33, 605917), (39, 512699), (127, 157443), (143, 139827), (367, 54483), (381, 52481), (429, 46609), (1101, 18161), (1397, 14313), (1651, 12111), (4037, 4953), (4191, 4771)]