21405228

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{3191}}^1$

素因数の和:3254

約数の個数: 48

約数和(自身を含む): 55055616

約数和(自身を除く): 33650388

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 43, 52, 78, 86, 129, 156, 172, 258, 516, 559, 1118, 1677, 2236, 3191, 3354, 6382, 6708, 9573, 12764, 19146, 38292, 41483, 82966, 124449, 137213, 165932, 248898, 274426, 411639, 497796, 548852, 823278, 1646556, 1783769, 3567538, 5351307, 7135076, 10702614, 21405228]

約数ペア:

[(1, 21405228), (2, 10702614), (3, 7135076), (4, 5351307), (6, 3567538), (12, 1783769), (13, 1646556), (26, 823278), (39, 548852), (43, 497796), (52, 411639), (78, 274426), (86, 248898), (129, 165932), (156, 137213), (172, 124449), (258, 82966), (516, 41483), (559, 38292), (1118, 19146), (1677, 12764), (2236, 9573), (3191, 6708), (3354, 6382)]