81242820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{523}}^1\times {\mathrm{863}}^1$

素因数の和:1401

約数の個数: 72

約数和(自身を含む): 247193856

約数和(自身を除く): 165951036

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 523, 863, 1046, 1569, 1726, 2092, 2589, 2615, 3138, 3452, 4315, 4707, 5178, 5230, 6276, 7767, 7845, 8630, 9414, 10356, 10460, 12945, 15534, 15690, 17260, 18828, 23535, 25890, 31068, 31380, 38835, 47070, 51780, 77670, 94140, 155340, 451349, 902698, 1354047, 1805396, 2256745, 2708094, 4062141, 4513490, 5416188, 6770235, 8124282, 9026980, 13540470, 16248564, 20310705, 27080940, 40621410, 81242820]

約数ペア:

[(1, 81242820), (2, 40621410), (3, 27080940), (4, 20310705), (5, 16248564), (6, 13540470), (9, 9026980), (10, 8124282), (12, 6770235), (15, 5416188), (18, 4513490), (20, 4062141), (30, 2708094), (36, 2256745), (45, 1805396), (60, 1354047), (90, 902698), (180, 451349), (523, 155340), (863, 94140), (1046, 77670), (1569, 51780), (1726, 47070), (2092, 38835), (2589, 31380), (2615, 31068), (3138, 25890), (3452, 23535), (4315, 18828), (4707, 17260), (5178, 15690), (5230, 15534), (6276, 12945), (7767, 10460), (7845, 10356), (8630, 9414)]