81304120

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{38351}}^1$

素因数の和:38415

約数の個数: 32

約数和(自身を含む): 186390720

約数和(自身を除く): 105086600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 38351, 76702, 153404, 191755, 306808, 383510, 767020, 1534040, 2032603, 4065206, 8130412, 10163015, 16260824, 20326030, 40652060, 81304120]

約数ペア:

[(1, 81304120), (2, 40652060), (4, 20326030), (5, 16260824), (8, 10163015), (10, 8130412), (20, 4065206), (40, 2032603), (53, 1534040), (106, 767020), (212, 383510), (265, 306808), (424, 191755), (530, 153404), (1060, 76702), (2120, 38351)]