18409456

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1321}}^1$

素因数の和:1409

約数の個数: 40

約数和(自身を含む): 39014864

約数和(自身を除く): 20605408

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 67, 104, 134, 208, 268, 536, 871, 1072, 1321, 1742, 2642, 3484, 5284, 6968, 10568, 13936, 17173, 21136, 34346, 68692, 88507, 137384, 177014, 274768, 354028, 708056, 1150591, 1416112, 2301182, 4602364, 9204728, 18409456]

約数ペア:

[(1, 18409456), (2, 9204728), (4, 4602364), (8, 2301182), (13, 1416112), (16, 1150591), (26, 708056), (52, 354028), (67, 274768), (104, 177014), (134, 137384), (208, 88507), (268, 68692), (536, 34346), (871, 21136), (1072, 17173), (1321, 13936), (1742, 10568), (2642, 6968), (3484, 5284)]