20989900

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{12347}}^1$

素因数の和:12378

約数の個数: 36

約数和(自身を含む): 48231288

約数和(自身を除く): 27241388

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 34, 50, 68, 85, 100, 170, 340, 425, 850, 1700, 12347, 24694, 49388, 61735, 123470, 209899, 246940, 308675, 419798, 617350, 839596, 1049495, 1234700, 2098990, 4197980, 5247475, 10494950, 20989900]

約数ペア:

[(1, 20989900), (2, 10494950), (4, 5247475), (5, 4197980), (10, 2098990), (17, 1234700), (20, 1049495), (25, 839596), (34, 617350), (50, 419798), (68, 308675), (85, 246940), (100, 209899), (170, 123470), (340, 61735), (425, 49388), (850, 24694), (1700, 12347)]