21122560

素因数分解:

$2^9\times 5^1\times {\mathrm{37}}^1\times {\mathrm{223}}^1$

素因数の和:283

約数の個数: 80

約数和(自身を含む): 52246656

約数和(自身を除く): 31124096

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 64, 74, 80, 128, 148, 160, 185, 223, 256, 296, 320, 370, 446, 512, 592, 640, 740, 892, 1115, 1184, 1280, 1480, 1784, 2230, 2368, 2560, 2960, 3568, 4460, 4736, 5920, 7136, 8251, 8920, 9472, 11840, 14272, 16502, 17840, 18944, 23680, 28544, 33004, 35680, 41255, 47360, 57088, 66008, 71360, 82510, 94720, 114176, 132016, 142720, 165020, 264032, 285440, 330040, 528064, 570880, 660080, 1056128, 1320160, 2112256, 2640320, 4224512, 5280640, 10561280, 21122560]

約数ペア:

[(1, 21122560), (2, 10561280), (4, 5280640), (5, 4224512), (8, 2640320), (10, 2112256), (16, 1320160), (20, 1056128), (32, 660080), (37, 570880), (40, 528064), (64, 330040), (74, 285440), (80, 264032), (128, 165020), (148, 142720), (160, 132016), (185, 114176), (223, 94720), (256, 82510), (296, 71360), (320, 66008), (370, 57088), (446, 47360), (512, 41255), (592, 35680), (640, 33004), (740, 28544), (892, 23680), (1115, 18944), (1184, 17840), (1280, 16502), (1480, 14272), (1784, 11840), (2230, 9472), (2368, 8920), (2560, 8251), (2960, 7136), (3568, 5920), (4460, 4736)]