21426867

素因数分解:

$3^2\times 7^3\times {\mathrm{11}}^1\times {\mathrm{631}}^1$

素因数の和:669

約数の個数: 48

約数和(自身を含む): 39436800

約数和(自身を除く): 18009933

約数列:

[1, 3, 7, 9, 11, 21, 33, 49, 63, 77, 99, 147, 231, 343, 441, 539, 631, 693, 1029, 1617, 1893, 3087, 3773, 4417, 4851, 5679, 6941, 11319, 13251, 20823, 30919, 33957, 39753, 48587, 62469, 92757, 145761, 216433, 278271, 340109, 437283, 649299, 1020327, 1947897, 2380763, 3060981, 7142289, 21426867]

約数ペア:

[(1, 21426867), (3, 7142289), (7, 3060981), (9, 2380763), (11, 1947897), (21, 1020327), (33, 649299), (49, 437283), (63, 340109), (77, 278271), (99, 216433), (147, 145761), (231, 92757), (343, 62469), (441, 48587), (539, 39753), (631, 33957), (693, 30919), (1029, 20823), (1617, 13251), (1893, 11319), (3087, 6941), (3773, 5679), (4417, 4851)]