19891755

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{919}}^1$

素因数の和:980

約数の個数: 48

約数和(自身を含む): 38176320

約数和(自身を除く): 18284565

約数列:

[1, 3, 5, 9, 13, 15, 37, 39, 45, 65, 111, 117, 185, 195, 333, 481, 555, 585, 919, 1443, 1665, 2405, 2757, 4329, 4595, 7215, 8271, 11947, 13785, 21645, 34003, 35841, 41355, 59735, 102009, 107523, 170015, 179205, 306027, 442039, 510045, 537615, 1326117, 1530135, 2210195, 3978351, 6630585, 19891755]

約数ペア:

[(1, 19891755), (3, 6630585), (5, 3978351), (9, 2210195), (13, 1530135), (15, 1326117), (37, 537615), (39, 510045), (45, 442039), (65, 306027), (111, 179205), (117, 170015), (185, 107523), (195, 102009), (333, 59735), (481, 41355), (555, 35841), (585, 34003), (919, 21645), (1443, 13785), (1665, 11947), (2405, 8271), (2757, 7215), (4329, 4595)]