18920960

素因数分解:

$2^9\times 5^1\times {\mathrm{19}}^1\times {\mathrm{389}}^1$

素因数の和:431

約数の個数: 80

約数和(自身を含む): 47876400

約数和(自身を除く): 28955440

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 128, 152, 160, 190, 256, 304, 320, 380, 389, 512, 608, 640, 760, 778, 1216, 1280, 1520, 1556, 1945, 2432, 2560, 3040, 3112, 3890, 4864, 6080, 6224, 7391, 7780, 9728, 12160, 12448, 14782, 15560, 24320, 24896, 29564, 31120, 36955, 48640, 49792, 59128, 62240, 73910, 99584, 118256, 124480, 147820, 199168, 236512, 248960, 295640, 473024, 497920, 591280, 946048, 995840, 1182560, 1892096, 2365120, 3784192, 4730240, 9460480, 18920960]

約数ペア:

[(1, 18920960), (2, 9460480), (4, 4730240), (5, 3784192), (8, 2365120), (10, 1892096), (16, 1182560), (19, 995840), (20, 946048), (32, 591280), (38, 497920), (40, 473024), (64, 295640), (76, 248960), (80, 236512), (95, 199168), (128, 147820), (152, 124480), (160, 118256), (190, 99584), (256, 73910), (304, 62240), (320, 59128), (380, 49792), (389, 48640), (512, 36955), (608, 31120), (640, 29564), (760, 24896), (778, 24320), (1216, 15560), (1280, 14782), (1520, 12448), (1556, 12160), (1945, 9728), (2432, 7780), (2560, 7391), (3040, 6224), (3112, 6080), (3890, 4864)]