20721045

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{3533}}^1$

素因数の和:3581

約数の個数: 32

約数和(自身を含む): 36640512

約数和(自身を除く): 15919467

約数列:

[1, 3, 5, 15, 17, 23, 51, 69, 85, 115, 255, 345, 391, 1173, 1955, 3533, 5865, 10599, 17665, 52995, 60061, 81259, 180183, 243777, 300305, 406295, 900915, 1218885, 1381403, 4144209, 6907015, 20721045]

約数ペア:

[(1, 20721045), (3, 6907015), (5, 4144209), (15, 1381403), (17, 1218885), (23, 900915), (51, 406295), (69, 300305), (85, 243777), (115, 180183), (255, 81259), (345, 60061), (391, 52995), (1173, 17665), (1955, 10599), (3533, 5865)]