20001410

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{197}}^1$

素因数の和:299

約数の個数: 64

約数和(自身を含む): 43110144

約数和(自身を除く): 23108734

約数列:

[1, 2, 5, 10, 11, 13, 22, 26, 55, 65, 71, 110, 130, 142, 143, 197, 286, 355, 394, 710, 715, 781, 923, 985, 1430, 1562, 1846, 1970, 2167, 2561, 3905, 4334, 4615, 5122, 7810, 9230, 10153, 10835, 12805, 13987, 20306, 21670, 25610, 27974, 28171, 50765, 56342, 69935, 101530, 139870, 140855, 153857, 181831, 281710, 307714, 363662, 769285, 909155, 1538570, 1818310, 2000141, 4000282, 10000705, 20001410]

約数ペア:

[(1, 20001410), (2, 10000705), (5, 4000282), (10, 2000141), (11, 1818310), (13, 1538570), (22, 909155), (26, 769285), (55, 363662), (65, 307714), (71, 281710), (110, 181831), (130, 153857), (142, 140855), (143, 139870), (197, 101530), (286, 69935), (355, 56342), (394, 50765), (710, 28171), (715, 27974), (781, 25610), (923, 21670), (985, 20306), (1430, 13987), (1562, 12805), (1846, 10835), (1970, 10153), (2167, 9230), (2561, 7810), (3905, 5122), (4334, 4615)]