21900705

素因数分解:

$3^1\times 5^1\times {\mathrm{571}}^1\times {\mathrm{2557}}^1$

素因数の和:3136

約数の個数: 16

約数和(自身を含む): 35116224

約数和(自身を除く): 13215519

約数列:

[1, 3, 5, 15, 571, 1713, 2557, 2855, 7671, 8565, 12785, 38355, 1460047, 4380141, 7300235, 21900705]

約数ペア:

[(1, 21900705), (3, 7300235), (5, 4380141), (15, 1460047), (571, 38355), (1713, 12785), (2557, 8565), (2855, 7671)]