81240460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{18719}}^1$

素因数の和:18766

約数の個数: 48

約数和(自身を含む): 201277440

約数和(自身を除く): 120036980

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 140, 155, 217, 310, 434, 620, 868, 1085, 2170, 4340, 18719, 37438, 74876, 93595, 131033, 187190, 262066, 374380, 524132, 580289, 655165, 1160578, 1310330, 2321156, 2620660, 2901445, 4062023, 5802890, 8124046, 11605780, 16248092, 20310115, 40620230, 81240460]

約数ペア:

[(1, 81240460), (2, 40620230), (4, 20310115), (5, 16248092), (7, 11605780), (10, 8124046), (14, 5802890), (20, 4062023), (28, 2901445), (31, 2620660), (35, 2321156), (62, 1310330), (70, 1160578), (124, 655165), (140, 580289), (155, 524132), (217, 374380), (310, 262066), (434, 187190), (620, 131033), (868, 93595), (1085, 74876), (2170, 37438), (4340, 18719)]