18381584

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1319}}^1$

素因数の和:1407

約数の個数: 40

約数和(自身を含む): 38955840

約数和(自身を除く): 20574256

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 67, 104, 134, 208, 268, 536, 871, 1072, 1319, 1742, 2638, 3484, 5276, 6968, 10552, 13936, 17147, 21104, 34294, 68588, 88373, 137176, 176746, 274352, 353492, 706984, 1148849, 1413968, 2297698, 4595396, 9190792, 18381584]

約数ペア:

[(1, 18381584), (2, 9190792), (4, 4595396), (8, 2297698), (13, 1413968), (16, 1148849), (26, 706984), (52, 353492), (67, 274352), (104, 176746), (134, 137176), (208, 88373), (268, 68588), (536, 34294), (871, 21104), (1072, 17147), (1319, 13936), (1742, 10552), (2638, 6968), (3484, 5276)]