81658880

素因数分解:

$2^{10}\times 5^1\times {\mathrm{41}}^1\times {\mathrm{389}}^1$

素因数の和:455

約数の個数: 88

約数和(自身を含む): 201179160

約数和(自身を除く): 119520280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 128, 160, 164, 205, 256, 320, 328, 389, 410, 512, 640, 656, 778, 820, 1024, 1280, 1312, 1556, 1640, 1945, 2560, 2624, 3112, 3280, 3890, 5120, 5248, 6224, 6560, 7780, 10496, 12448, 13120, 15560, 15949, 20992, 24896, 26240, 31120, 31898, 41984, 49792, 52480, 62240, 63796, 79745, 99584, 104960, 124480, 127592, 159490, 199168, 209920, 248960, 255184, 318980, 398336, 497920, 510368, 637960, 995840, 1020736, 1275920, 1991680, 2041472, 2551840, 4082944, 5103680, 8165888, 10207360, 16331776, 20414720, 40829440, 81658880]

約数ペア:

[(1, 81658880), (2, 40829440), (4, 20414720), (5, 16331776), (8, 10207360), (10, 8165888), (16, 5103680), (20, 4082944), (32, 2551840), (40, 2041472), (41, 1991680), (64, 1275920), (80, 1020736), (82, 995840), (128, 637960), (160, 510368), (164, 497920), (205, 398336), (256, 318980), (320, 255184), (328, 248960), (389, 209920), (410, 199168), (512, 159490), (640, 127592), (656, 124480), (778, 104960), (820, 99584), (1024, 79745), (1280, 63796), (1312, 62240), (1556, 52480), (1640, 49792), (1945, 41984), (2560, 31898), (2624, 31120), (3112, 26240), (3280, 24896), (3890, 20992), (5120, 15949), (5248, 15560), (6224, 13120), (6560, 12448), (7780, 10496)]