19919744

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{11971}}^1$

素因数の和:11998

約数の個数: 32

約数和(自身を含む): 42740040

約数和(自身を除く): 22820296

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 104, 128, 208, 416, 832, 1664, 11971, 23942, 47884, 95768, 155623, 191536, 311246, 383072, 622492, 766144, 1244984, 1532288, 2489968, 4979936, 9959872, 19919744]

約数ペア:

[(1, 19919744), (2, 9959872), (4, 4979936), (8, 2489968), (13, 1532288), (16, 1244984), (26, 766144), (32, 622492), (52, 383072), (64, 311246), (104, 191536), (128, 155623), (208, 95768), (416, 47884), (832, 23942), (1664, 11971)]