19963559

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{151}}^1$

素因数の和:287

約数の個数: 32

約数和(自身を含む): 26790912

約数和(自身を除く): 6827353

約数列:

[1, 7, 11, 17, 77, 101, 119, 151, 187, 707, 1057, 1111, 1309, 1661, 1717, 2567, 7777, 11627, 12019, 15251, 17969, 18887, 28237, 106757, 132209, 167761, 197659, 259267, 1174327, 1814869, 2851937, 19963559]

約数ペア:

[(1, 19963559), (7, 2851937), (11, 1814869), (17, 1174327), (77, 259267), (101, 197659), (119, 167761), (151, 132209), (187, 106757), (707, 28237), (1057, 18887), (1111, 17969), (1309, 15251), (1661, 12019), (1717, 11627), (2567, 7777)]