20985420

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{397}}^1\times {\mathrm{881}}^1$

素因数の和:1290

約数の個数: 48

約数和(自身を含む): 58974048

約数和(自身を除く): 37988628

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 397, 794, 881, 1191, 1588, 1762, 1985, 2382, 2643, 3524, 3970, 4405, 4764, 5286, 5955, 7940, 8810, 10572, 11910, 13215, 17620, 23820, 26430, 52860, 349757, 699514, 1049271, 1399028, 1748785, 2098542, 3497570, 4197084, 5246355, 6995140, 10492710, 20985420]

約数ペア:

[(1, 20985420), (2, 10492710), (3, 6995140), (4, 5246355), (5, 4197084), (6, 3497570), (10, 2098542), (12, 1748785), (15, 1399028), (20, 1049271), (30, 699514), (60, 349757), (397, 52860), (794, 26430), (881, 23820), (1191, 17620), (1588, 13215), (1762, 11910), (1985, 10572), (2382, 8810), (2643, 7940), (3524, 5955), (3970, 5286), (4405, 4764)]