19920290

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{4943}}^1$

素因数の和:4994

約数の個数: 32

約数和(自身を含む): 39868416

約数和(自身を除く): 19948126

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 310, 403, 806, 2015, 4030, 4943, 9886, 24715, 49430, 64259, 128518, 153233, 306466, 321295, 642590, 766165, 1532330, 1992029, 3984058, 9960145, 19920290]

約数ペア:

[(1, 19920290), (2, 9960145), (5, 3984058), (10, 1992029), (13, 1532330), (26, 766165), (31, 642590), (62, 321295), (65, 306466), (130, 153233), (155, 128518), (310, 64259), (403, 49430), (806, 24715), (2015, 9886), (4030, 4943)]