156890980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{4639}}^1$

素因数の和:4756

約数の個数: 48

約数和(自身を含む): 350784000

約数和(自身を除く): 193893020

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 89, 95, 178, 190, 356, 380, 445, 890, 1691, 1780, 3382, 4639, 6764, 8455, 9278, 16910, 18556, 23195, 33820, 46390, 88141, 92780, 176282, 352564, 412871, 440705, 825742, 881410, 1651484, 1762820, 2064355, 4128710, 7844549, 8257420, 15689098, 31378196, 39222745, 78445490, 156890980]

約数ペア:

[(1, 156890980), (2, 78445490), (4, 39222745), (5, 31378196), (10, 15689098), (19, 8257420), (20, 7844549), (38, 4128710), (76, 2064355), (89, 1762820), (95, 1651484), (178, 881410), (190, 825742), (356, 440705), (380, 412871), (445, 352564), (890, 176282), (1691, 92780), (1780, 88141), (3382, 46390), (4639, 33820), (6764, 23195), (8455, 18556), (9278, 16910)]