20421280

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{283}}^1$

素因数の和:350

約数の個数: 96

約数和(自身を含む): 54105408

約数和(自身を除く): 33684128

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 41, 44, 55, 80, 82, 88, 110, 160, 164, 176, 205, 220, 283, 328, 352, 410, 440, 451, 566, 656, 820, 880, 902, 1132, 1312, 1415, 1640, 1760, 1804, 2255, 2264, 2830, 3113, 3280, 3608, 4510, 4528, 5660, 6226, 6560, 7216, 9020, 9056, 11320, 11603, 12452, 14432, 15565, 18040, 22640, 23206, 24904, 31130, 36080, 45280, 46412, 49808, 58015, 62260, 72160, 92824, 99616, 116030, 124520, 127633, 185648, 232060, 249040, 255266, 371296, 464120, 498080, 510532, 638165, 928240, 1021064, 1276330, 1856480, 2042128, 2552660, 4084256, 5105320, 10210640, 20421280]

約数ペア:

[(1, 20421280), (2, 10210640), (4, 5105320), (5, 4084256), (8, 2552660), (10, 2042128), (11, 1856480), (16, 1276330), (20, 1021064), (22, 928240), (32, 638165), (40, 510532), (41, 498080), (44, 464120), (55, 371296), (80, 255266), (82, 249040), (88, 232060), (110, 185648), (160, 127633), (164, 124520), (176, 116030), (205, 99616), (220, 92824), (283, 72160), (328, 62260), (352, 58015), (410, 49808), (440, 46412), (451, 45280), (566, 36080), (656, 31130), (820, 24904), (880, 23206), (902, 22640), (1132, 18040), (1312, 15565), (1415, 14432), (1640, 12452), (1760, 11603), (1804, 11320), (2255, 9056), (2264, 9020), (2830, 7216), (3113, 6560), (3280, 6226), (3608, 5660), (4510, 4528)]