21164728

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{11971}}^1$

素因数の和:12007

約数の個数: 32

約数和(自身を含む): 45254160

約数和(自身を除く): 24089432

約数列:

[1, 2, 4, 8, 13, 17, 26, 34, 52, 68, 104, 136, 221, 442, 884, 1768, 11971, 23942, 47884, 95768, 155623, 203507, 311246, 407014, 622492, 814028, 1244984, 1628056, 2645591, 5291182, 10582364, 21164728]

約数ペア:

[(1, 21164728), (2, 10582364), (4, 5291182), (8, 2645591), (13, 1628056), (17, 1244984), (26, 814028), (34, 622492), (52, 407014), (68, 311246), (104, 203507), (136, 155623), (221, 95768), (442, 47884), (884, 23942), (1768, 11971)]