21726224

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1559}}^1$

素因数の和:1647

約数の個数: 40

約数和(自身を含む): 46038720

約数和(自身を除く): 24312496

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 67, 104, 134, 208, 268, 536, 871, 1072, 1559, 1742, 3118, 3484, 6236, 6968, 12472, 13936, 20267, 24944, 40534, 81068, 104453, 162136, 208906, 324272, 417812, 835624, 1357889, 1671248, 2715778, 5431556, 10863112, 21726224]

約数ペア:

[(1, 21726224), (2, 10863112), (4, 5431556), (8, 2715778), (13, 1671248), (16, 1357889), (26, 835624), (52, 417812), (67, 324272), (104, 208906), (134, 162136), (208, 104453), (268, 81068), (536, 40534), (871, 24944), (1072, 20267), (1559, 13936), (1742, 12472), (3118, 6968), (3484, 6236)]