21157815

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{8761}}^1$

素因数の和:8799

約数の個数: 32

約数和(自身を含む): 40375296

約数和(自身を除く): 19217481

約数列:

[1, 3, 5, 7, 15, 21, 23, 35, 69, 105, 115, 161, 345, 483, 805, 2415, 8761, 26283, 43805, 61327, 131415, 183981, 201503, 306635, 604509, 919905, 1007515, 1410521, 3022545, 4231563, 7052605, 21157815]

約数ペア:

[(1, 21157815), (3, 7052605), (5, 4231563), (7, 3022545), (15, 1410521), (21, 1007515), (23, 919905), (35, 604509), (69, 306635), (105, 201503), (115, 183981), (161, 131415), (345, 61327), (483, 43805), (805, 26283), (2415, 8761)]