21491907160

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{131}}^1\times {\mathrm{40609}}^1$

素因数の和:40852

約数の個数: 64

約数和(自身を含む): 49209573600

約数和(自身を除く): 27717666440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 131, 202, 262, 404, 505, 524, 655, 808, 1010, 1048, 1310, 2020, 2620, 4040, 5240, 13231, 26462, 40609, 52924, 66155, 81218, 105848, 132310, 162436, 203045, 264620, 324872, 406090, 529240, 812180, 1624360, 4101509, 5319779, 8203018, 10639558, 16406036, 20507545, 21279116, 26598895, 32812072, 41015090, 42558232, 53197790, 82030180, 106395580, 164060360, 212791160, 537297679, 1074595358, 2149190716, 2686488395, 4298381432, 5372976790, 10745953580, 21491907160]

約数ペア:

[(1, 21491907160), (2, 10745953580), (4, 5372976790), (5, 4298381432), (8, 2686488395), (10, 2149190716), (20, 1074595358), (40, 537297679), (101, 212791160), (131, 164060360), (202, 106395580), (262, 82030180), (404, 53197790), (505, 42558232), (524, 41015090), (655, 32812072), (808, 26598895), (1010, 21279116), (1048, 20507545), (1310, 16406036), (2020, 10639558), (2620, 8203018), (4040, 5319779), (5240, 4101509), (13231, 1624360), (26462, 812180), (40609, 529240), (52924, 406090), (66155, 324872), (81218, 264620), (105848, 203045), (132310, 162436)]