19976710

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{4957}}^1$

素因数の和:5008

約数の個数: 32

約数和(自身を含む): 39981312

約数和(自身を除く): 20004602

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 310, 403, 806, 2015, 4030, 4957, 9914, 24785, 49570, 64441, 128882, 153667, 307334, 322205, 644410, 768335, 1536670, 1997671, 3995342, 9988355, 19976710]

約数ペア:

[(1, 19976710), (2, 9988355), (5, 3995342), (10, 1997671), (13, 1536670), (26, 768335), (31, 644410), (62, 322205), (65, 307334), (130, 153667), (155, 128882), (310, 64441), (403, 49570), (806, 24785), (2015, 9914), (4030, 4957)]