19786809

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{491}}^1$

素因数の和:621

約数の個数: 32

約数和(自身を含む): 32117760

約数和(自身を除く): 12330951

約数列:

[1, 3, 7, 19, 21, 57, 101, 133, 303, 399, 491, 707, 1473, 1919, 2121, 3437, 5757, 9329, 10311, 13433, 27987, 40299, 49591, 65303, 148773, 195909, 347137, 942229, 1041411, 2826687, 6595603, 19786809]

約数ペア:

[(1, 19786809), (3, 6595603), (7, 2826687), (19, 1041411), (21, 942229), (57, 347137), (101, 195909), (133, 148773), (303, 65303), (399, 49591), (491, 40299), (707, 27987), (1473, 13433), (1919, 10311), (2121, 9329), (3437, 5757)]