21694720

素因数分解:

$2^8\times 5^1\times {\mathrm{17}}^1\times {\mathrm{997}}^1$

素因数の和:1035

約数の個数: 72

約数和(自身を含む): 55077624

約数和(自身を除く): 33382904

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 256, 272, 320, 340, 544, 640, 680, 997, 1088, 1280, 1360, 1994, 2176, 2720, 3988, 4352, 4985, 5440, 7976, 9970, 10880, 15952, 16949, 19940, 21760, 31904, 33898, 39880, 63808, 67796, 79760, 84745, 127616, 135592, 159520, 169490, 255232, 271184, 319040, 338980, 542368, 638080, 677960, 1084736, 1276160, 1355920, 2169472, 2711840, 4338944, 5423680, 10847360, 21694720]

約数ペア:

[(1, 21694720), (2, 10847360), (4, 5423680), (5, 4338944), (8, 2711840), (10, 2169472), (16, 1355920), (17, 1276160), (20, 1084736), (32, 677960), (34, 638080), (40, 542368), (64, 338980), (68, 319040), (80, 271184), (85, 255232), (128, 169490), (136, 159520), (160, 135592), (170, 127616), (256, 84745), (272, 79760), (320, 67796), (340, 63808), (544, 39880), (640, 33898), (680, 31904), (997, 21760), (1088, 19940), (1280, 16949), (1360, 15952), (1994, 10880), (2176, 9970), (2720, 7976), (3988, 5440), (4352, 4985)]