20121290

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{1289}}^1$

素因数の和:1526

約数の個数: 32

約数和(自身を含む): 41610240

約数和(自身を除く): 21488950

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 223, 446, 1115, 1289, 1561, 2230, 2578, 3122, 6445, 7805, 9023, 12890, 15610, 18046, 45115, 90230, 287447, 574894, 1437235, 2012129, 2874470, 4024258, 10060645, 20121290]

約数ペア:

[(1, 20121290), (2, 10060645), (5, 4024258), (7, 2874470), (10, 2012129), (14, 1437235), (35, 574894), (70, 287447), (223, 90230), (446, 45115), (1115, 18046), (1289, 15610), (1561, 12890), (2230, 9023), (2578, 7805), (3122, 6445)]