19797700

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{157}}^1$

素因数の和:281

約数の個数: 72

約数和(自身を含む): 47040392

約数和(自身を除く): 27242692

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 97, 100, 130, 157, 194, 260, 314, 325, 388, 485, 628, 650, 785, 970, 1261, 1300, 1570, 1940, 2041, 2425, 2522, 3140, 3925, 4082, 4850, 5044, 6305, 7850, 8164, 9700, 10205, 12610, 15229, 15700, 20410, 25220, 30458, 31525, 40820, 51025, 60916, 63050, 76145, 102050, 126100, 152290, 197977, 204100, 304580, 380725, 395954, 761450, 791908, 989885, 1522900, 1979770, 3959540, 4949425, 9898850, 19797700]

約数ペア:

[(1, 19797700), (2, 9898850), (4, 4949425), (5, 3959540), (10, 1979770), (13, 1522900), (20, 989885), (25, 791908), (26, 761450), (50, 395954), (52, 380725), (65, 304580), (97, 204100), (100, 197977), (130, 152290), (157, 126100), (194, 102050), (260, 76145), (314, 63050), (325, 60916), (388, 51025), (485, 40820), (628, 31525), (650, 30458), (785, 25220), (970, 20410), (1261, 15700), (1300, 15229), (1570, 12610), (1940, 10205), (2041, 9700), (2425, 8164), (2522, 7850), (3140, 6305), (3925, 5044), (4082, 4850)]