21418815

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{11801}}^1$

素因数の和:11831

約数の個数: 24

約数和(自身を含む): 37671984

約数和(自身を除く): 16253169

約数列:

[1, 3, 5, 11, 15, 33, 55, 121, 165, 363, 605, 1815, 11801, 35403, 59005, 129811, 177015, 389433, 649055, 1427921, 1947165, 4283763, 7139605, 21418815]

約数ペア:

[(1, 21418815), (3, 7139605), (5, 4283763), (11, 1947165), (15, 1427921), (33, 649055), (55, 389433), (121, 177015), (165, 129811), (363, 59005), (605, 35403), (1815, 11801)]