18972304

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1721}}^1$

素因数の和:1795

約数の個数: 40

約数和(自身を含む): 40356792

約数和(自身を除く): 21384488

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 53, 104, 106, 208, 212, 424, 689, 848, 1378, 1721, 2756, 3442, 5512, 6884, 11024, 13768, 22373, 27536, 44746, 89492, 91213, 178984, 182426, 357968, 364852, 729704, 1185769, 1459408, 2371538, 4743076, 9486152, 18972304]

約数ペア:

[(1, 18972304), (2, 9486152), (4, 4743076), (8, 2371538), (13, 1459408), (16, 1185769), (26, 729704), (52, 364852), (53, 357968), (104, 182426), (106, 178984), (208, 91213), (212, 89492), (424, 44746), (689, 27536), (848, 22373), (1378, 13768), (1721, 11024), (2756, 6884), (3442, 5512)]