19828784

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{67}}^1\times {\mathrm{349}}^1$

素因数の和:477

約数の個数: 40

約数和(自身を含む): 39841200

約数和(自身を除く): 20012416

約数列:

[1, 2, 4, 8, 16, 53, 67, 106, 134, 212, 268, 349, 424, 536, 698, 848, 1072, 1396, 2792, 3551, 5584, 7102, 14204, 18497, 23383, 28408, 36994, 46766, 56816, 73988, 93532, 147976, 187064, 295952, 374128, 1239299, 2478598, 4957196, 9914392, 19828784]

約数ペア:

[(1, 19828784), (2, 9914392), (4, 4957196), (8, 2478598), (16, 1239299), (53, 374128), (67, 295952), (106, 187064), (134, 147976), (212, 93532), (268, 73988), (349, 56816), (424, 46766), (536, 36994), (698, 28408), (848, 23383), (1072, 18497), (1396, 14204), (2792, 7102), (3551, 5584)]