21625520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{23}}^2\times {\mathrm{73}}^1$

素因数の和:139

約数の個数: 120

約数和(自身を含む): 60891936

約数和(自身を除く): 39266416

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 35, 40, 46, 56, 70, 73, 80, 92, 112, 115, 140, 146, 161, 184, 230, 280, 292, 322, 365, 368, 460, 511, 529, 560, 584, 644, 730, 805, 920, 1022, 1058, 1168, 1288, 1460, 1610, 1679, 1840, 2044, 2116, 2555, 2576, 2645, 2920, 3220, 3358, 3703, 4088, 4232, 5110, 5290, 5840, 6440, 6716, 7406, 8176, 8395, 8464, 10220, 10580, 11753, 12880, 13432, 14812, 16790, 18515, 20440, 21160, 23506, 26864, 29624, 33580, 37030, 38617, 40880, 42320, 47012, 58765, 59248, 67160, 74060, 77234, 94024, 117530, 134320, 148120, 154468, 188048, 193085, 235060, 270319, 296240, 308936, 386170, 470120, 540638, 617872, 772340, 940240, 1081276, 1351595, 1544680, 2162552, 2703190, 3089360, 4325104, 5406380, 10812760, 21625520]

約数ペア:

[(1, 21625520), (2, 10812760), (4, 5406380), (5, 4325104), (7, 3089360), (8, 2703190), (10, 2162552), (14, 1544680), (16, 1351595), (20, 1081276), (23, 940240), (28, 772340), (35, 617872), (40, 540638), (46, 470120), (56, 386170), (70, 308936), (73, 296240), (80, 270319), (92, 235060), (112, 193085), (115, 188048), (140, 154468), (146, 148120), (161, 134320), (184, 117530), (230, 94024), (280, 77234), (292, 74060), (322, 67160), (365, 59248), (368, 58765), (460, 47012), (511, 42320), (529, 40880), (560, 38617), (584, 37030), (644, 33580), (730, 29624), (805, 26864), (920, 23506), (1022, 21160), (1058, 20440), (1168, 18515), (1288, 16790), (1460, 14812), (1610, 13432), (1679, 12880), (1840, 11753), (2044, 10580), (2116, 10220), (2555, 8464), (2576, 8395), (2645, 8176), (2920, 7406), (3220, 6716), (3358, 6440), (3703, 5840), (4088, 5290), (4232, 5110)]