20577920

素因数分解:

$2^7\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1$

素因数の和:146

約数の個数: 128

約数和(自身を含む): 55814400

約数和(自身を除く): 35236480

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 37, 40, 44, 55, 64, 74, 79, 80, 88, 110, 128, 148, 158, 160, 176, 185, 220, 296, 316, 320, 352, 370, 395, 407, 440, 592, 632, 640, 704, 740, 790, 814, 869, 880, 1184, 1264, 1408, 1480, 1580, 1628, 1738, 1760, 2035, 2368, 2528, 2923, 2960, 3160, 3256, 3476, 3520, 4070, 4345, 4736, 5056, 5846, 5920, 6320, 6512, 6952, 7040, 8140, 8690, 10112, 11692, 11840, 12640, 13024, 13904, 14615, 16280, 17380, 23384, 23680, 25280, 26048, 27808, 29230, 32153, 32560, 34760, 46768, 50560, 52096, 55616, 58460, 64306, 65120, 69520, 93536, 111232, 116920, 128612, 130240, 139040, 160765, 187072, 233840, 257224, 260480, 278080, 321530, 374144, 467680, 514448, 556160, 643060, 935360, 1028896, 1286120, 1870720, 2057792, 2572240, 4115584, 5144480, 10288960, 20577920]

約数ペア:

[(1, 20577920), (2, 10288960), (4, 5144480), (5, 4115584), (8, 2572240), (10, 2057792), (11, 1870720), (16, 1286120), (20, 1028896), (22, 935360), (32, 643060), (37, 556160), (40, 514448), (44, 467680), (55, 374144), (64, 321530), (74, 278080), (79, 260480), (80, 257224), (88, 233840), (110, 187072), (128, 160765), (148, 139040), (158, 130240), (160, 128612), (176, 116920), (185, 111232), (220, 93536), (296, 69520), (316, 65120), (320, 64306), (352, 58460), (370, 55616), (395, 52096), (407, 50560), (440, 46768), (592, 34760), (632, 32560), (640, 32153), (704, 29230), (740, 27808), (790, 26048), (814, 25280), (869, 23680), (880, 23384), (1184, 17380), (1264, 16280), (1408, 14615), (1480, 13904), (1580, 13024), (1628, 12640), (1738, 11840), (1760, 11692), (2035, 10112), (2368, 8690), (2528, 8140), (2923, 7040), (2960, 6952), (3160, 6512), (3256, 6320), (3476, 5920), (3520, 5846), (4070, 5056), (4345, 4736)]