19398915

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{191}}^1$

素因数の和:300

約数の個数: 48

約数和(自身を含む): 35283456

約数和(自身を除く): 15884541

約数列:

[1, 3, 5, 9, 15, 37, 45, 61, 111, 183, 185, 191, 305, 333, 549, 555, 573, 915, 955, 1665, 1719, 2257, 2745, 2865, 6771, 7067, 8595, 11285, 11651, 20313, 21201, 33855, 34953, 35335, 58255, 63603, 101565, 104859, 106005, 174765, 318015, 431087, 524295, 1293261, 2155435, 3879783, 6466305, 19398915]

約数ペア:

[(1, 19398915), (3, 6466305), (5, 3879783), (9, 2155435), (15, 1293261), (37, 524295), (45, 431087), (61, 318015), (111, 174765), (183, 106005), (185, 104859), (191, 101565), (305, 63603), (333, 58255), (549, 35335), (555, 34953), (573, 33855), (915, 21201), (955, 20313), (1665, 11651), (1719, 11285), (2257, 8595), (2745, 7067), (2865, 6771)]