31720455

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{97}}^1$

素因数の和:177

約数の個数: 72

約数和(自身を含む): 61549488

約数和(自身を除く): 29829033

約数列:

[1, 3, 5, 9, 13, 15, 39, 43, 45, 65, 97, 117, 129, 169, 195, 215, 291, 387, 485, 507, 559, 585, 645, 845, 873, 1261, 1455, 1521, 1677, 1935, 2535, 2795, 3783, 4171, 4365, 5031, 6305, 7267, 7605, 8385, 11349, 12513, 16393, 18915, 20855, 21801, 25155, 36335, 37539, 49179, 54223, 56745, 62565, 65403, 81965, 109005, 147537, 162669, 187695, 245895, 271115, 327015, 488007, 704899, 737685, 813345, 2114697, 2440035, 3524495, 6344091, 10573485, 31720455]

約数ペア:

[(1, 31720455), (3, 10573485), (5, 6344091), (9, 3524495), (13, 2440035), (15, 2114697), (39, 813345), (43, 737685), (45, 704899), (65, 488007), (97, 327015), (117, 271115), (129, 245895), (169, 187695), (195, 162669), (215, 147537), (291, 109005), (387, 81965), (485, 65403), (507, 62565), (559, 56745), (585, 54223), (645, 49179), (845, 37539), (873, 36335), (1261, 25155), (1455, 21801), (1521, 20855), (1677, 18915), (1935, 16393), (2535, 12513), (2795, 11349), (3783, 8385), (4171, 7605), (4365, 7267), (5031, 6305)]