21175980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{397}}^1$

素因数の和:543

約数の個数: 96

約数和(自身を含む): 68468736

約数和(自身を除く): 47292756

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 127, 140, 210, 254, 381, 397, 420, 508, 635, 762, 794, 889, 1191, 1270, 1524, 1588, 1778, 1905, 1985, 2382, 2540, 2667, 2779, 3556, 3810, 3970, 4445, 4764, 5334, 5558, 5955, 7620, 7940, 8337, 8890, 10668, 11116, 11910, 13335, 13895, 16674, 17780, 23820, 26670, 27790, 33348, 41685, 50419, 53340, 55580, 83370, 100838, 151257, 166740, 201676, 252095, 302514, 352933, 504190, 605028, 705866, 756285, 1008380, 1058799, 1411732, 1512570, 1764665, 2117598, 3025140, 3529330, 4235196, 5293995, 7058660, 10587990, 21175980]

約数ペア:

[(1, 21175980), (2, 10587990), (3, 7058660), (4, 5293995), (5, 4235196), (6, 3529330), (7, 3025140), (10, 2117598), (12, 1764665), (14, 1512570), (15, 1411732), (20, 1058799), (21, 1008380), (28, 756285), (30, 705866), (35, 605028), (42, 504190), (60, 352933), (70, 302514), (84, 252095), (105, 201676), (127, 166740), (140, 151257), (210, 100838), (254, 83370), (381, 55580), (397, 53340), (420, 50419), (508, 41685), (635, 33348), (762, 27790), (794, 26670), (889, 23820), (1191, 17780), (1270, 16674), (1524, 13895), (1588, 13335), (1778, 11910), (1905, 11116), (1985, 10668), (2382, 8890), (2540, 8337), (2667, 7940), (2779, 7620), (3556, 5955), (3810, 5558), (3970, 5334), (4445, 4764)]