19978490

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{12409}}^1$

素因数の和:12446

約数の個数: 32

約数和(自身を含む): 42888960

約数和(自身を除く): 22910470

約数列:

[1, 2, 5, 7, 10, 14, 23, 35, 46, 70, 115, 161, 230, 322, 805, 1610, 12409, 24818, 62045, 86863, 124090, 173726, 285407, 434315, 570814, 868630, 1427035, 1997849, 2854070, 3995698, 9989245, 19978490]

約数ペア:

[(1, 19978490), (2, 9989245), (5, 3995698), (7, 2854070), (10, 1997849), (14, 1427035), (23, 868630), (35, 570814), (46, 434315), (70, 285407), (115, 173726), (161, 124090), (230, 86863), (322, 62045), (805, 24818), (1610, 12409)]