21950820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{121949}}^1$

素因数の和:121964

約数の個数: 36

約数和(自身を含む): 66584700

約数和(自身を除く): 44633880

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 121949, 243898, 365847, 487796, 609745, 731694, 1097541, 1219490, 1463388, 1829235, 2195082, 2438980, 3658470, 4390164, 5487705, 7316940, 10975410, 21950820]

約数ペア:

[(1, 21950820), (2, 10975410), (3, 7316940), (4, 5487705), (5, 4390164), (6, 3658470), (9, 2438980), (10, 2195082), (12, 1829235), (15, 1463388), (18, 1219490), (20, 1097541), (30, 731694), (36, 609745), (45, 487796), (60, 365847), (90, 243898), (180, 121949)]