81312420

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{193601}}^1$

素因数の和:193620

約数の個数: 48

約数和(自身を含む): 260201088

約数和(自身を除く): 178888668

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 193601, 387202, 580803, 774404, 968005, 1161606, 1355207, 1936010, 2323212, 2710414, 2904015, 3872020, 4065621, 5420828, 5808030, 6776035, 8131242, 11616060, 13552070, 16262484, 20328105, 27104140, 40656210, 81312420]

約数ペア:

[(1, 81312420), (2, 40656210), (3, 27104140), (4, 20328105), (5, 16262484), (6, 13552070), (7, 11616060), (10, 8131242), (12, 6776035), (14, 5808030), (15, 5420828), (20, 4065621), (21, 3872020), (28, 2904015), (30, 2710414), (35, 2323212), (42, 1936010), (60, 1355207), (70, 1161606), (84, 968005), (105, 774404), (140, 580803), (210, 387202), (420, 193601)]