21488715

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{613}}^1$

素因数の和:684

約数の個数: 48

約数和(自身を含む): 40229280

約数和(自身を除く): 18740565

約数列:

[1, 3, 5, 9, 15, 19, 41, 45, 57, 95, 123, 171, 205, 285, 369, 613, 615, 779, 855, 1839, 1845, 2337, 3065, 3895, 5517, 7011, 9195, 11647, 11685, 25133, 27585, 34941, 35055, 58235, 75399, 104823, 125665, 174705, 226197, 376995, 477527, 524115, 1130985, 1432581, 2387635, 4297743, 7162905, 21488715]

約数ペア:

[(1, 21488715), (3, 7162905), (5, 4297743), (9, 2387635), (15, 1432581), (19, 1130985), (41, 524115), (45, 477527), (57, 376995), (95, 226197), (123, 174705), (171, 125665), (205, 104823), (285, 75399), (369, 58235), (613, 35055), (615, 34941), (779, 27585), (855, 25133), (1839, 11685), (1845, 11647), (2337, 9195), (3065, 7011), (3895, 5517)]