21780477

素因数分解:

$3^2\times {\mathrm{61}}^1\times {\mathrm{97}}^1\times {\mathrm{409}}^1$

素因数の和:573

約数の個数: 24

約数和(自身を含む): 32385080

約数和(自身を除く): 10604603

約数列:

[1, 3, 9, 61, 97, 183, 291, 409, 549, 873, 1227, 3681, 5917, 17751, 24949, 39673, 53253, 74847, 119019, 224541, 357057, 2420053, 7260159, 21780477]

約数ペア:

[(1, 21780477), (3, 7260159), (9, 2420053), (61, 357057), (97, 224541), (183, 119019), (291, 74847), (409, 53253), (549, 39673), (873, 24949), (1227, 17751), (3681, 5917)]