21857495

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{241}}^1$

素因数の和:371

約数の個数: 32

約数和(自身を含む): 30735936

約数和(自身を除く): 8878441

約数列:

[1, 5, 11, 17, 55, 85, 97, 187, 241, 485, 935, 1067, 1205, 1649, 2651, 4097, 5335, 8245, 13255, 18139, 20485, 23377, 45067, 90695, 116885, 225335, 257147, 397409, 1285735, 1987045, 4371499, 21857495]

約数ペア:

[(1, 21857495), (5, 4371499), (11, 1987045), (17, 1285735), (55, 397409), (85, 257147), (97, 225335), (187, 116885), (241, 90695), (485, 45067), (935, 23377), (1067, 20485), (1205, 18139), (1649, 13255), (2651, 8245), (4097, 5335)]