21465920

素因数分解:

$2^6\times 5^1\times 7^2\times {\mathrm{37}}^2$

素因数の和:105

約数の個数: 126

約数和(自身を含む): 61111638

約数和(自身を除く): 39645718

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 37, 40, 49, 56, 64, 70, 74, 80, 98, 112, 140, 148, 160, 185, 196, 224, 245, 259, 280, 296, 320, 370, 392, 448, 490, 518, 560, 592, 740, 784, 980, 1036, 1120, 1184, 1295, 1369, 1480, 1568, 1813, 1960, 2072, 2240, 2368, 2590, 2738, 2960, 3136, 3626, 3920, 4144, 5180, 5476, 5920, 6845, 7252, 7840, 8288, 9065, 9583, 10360, 10952, 11840, 13690, 14504, 15680, 16576, 18130, 19166, 20720, 21904, 27380, 29008, 36260, 38332, 41440, 43808, 47915, 54760, 58016, 67081, 72520, 76664, 82880, 87616, 95830, 109520, 116032, 134162, 145040, 153328, 191660, 219040, 268324, 290080, 306656, 335405, 383320, 438080, 536648, 580160, 613312, 670810, 766640, 1073296, 1341620, 1533280, 2146592, 2683240, 3066560, 4293184, 5366480, 10732960, 21465920]

約数ペア:

[(1, 21465920), (2, 10732960), (4, 5366480), (5, 4293184), (7, 3066560), (8, 2683240), (10, 2146592), (14, 1533280), (16, 1341620), (20, 1073296), (28, 766640), (32, 670810), (35, 613312), (37, 580160), (40, 536648), (49, 438080), (56, 383320), (64, 335405), (70, 306656), (74, 290080), (80, 268324), (98, 219040), (112, 191660), (140, 153328), (148, 145040), (160, 134162), (185, 116032), (196, 109520), (224, 95830), (245, 87616), (259, 82880), (280, 76664), (296, 72520), (320, 67081), (370, 58016), (392, 54760), (448, 47915), (490, 43808), (518, 41440), (560, 38332), (592, 36260), (740, 29008), (784, 27380), (980, 21904), (1036, 20720), (1120, 19166), (1184, 18130), (1295, 16576), (1369, 15680), (1480, 14504), (1568, 13690), (1813, 11840), (1960, 10952), (2072, 10360), (2240, 9583), (2368, 9065), (2590, 8288), (2738, 7840), (2960, 7252), (3136, 6845), (3626, 5920), (3920, 5476), (4144, 5180)]