21012320

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{257}}^1$

素因数の和:352

約数の個数: 96

約数和(自身を含む): 57734208

約数和(自身を除く): 36721888

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 73, 80, 112, 140, 146, 160, 224, 257, 280, 292, 365, 511, 514, 560, 584, 730, 1022, 1028, 1120, 1168, 1285, 1460, 1799, 2044, 2056, 2336, 2555, 2570, 2920, 3598, 4088, 4112, 5110, 5140, 5840, 7196, 8176, 8224, 8995, 10220, 10280, 11680, 14392, 16352, 17990, 18761, 20440, 20560, 28784, 35980, 37522, 40880, 41120, 57568, 71960, 75044, 81760, 93805, 131327, 143920, 150088, 187610, 262654, 287840, 300176, 375220, 525308, 600352, 656635, 750440, 1050616, 1313270, 1500880, 2101232, 2626540, 3001760, 4202464, 5253080, 10506160, 21012320]

約数ペア:

[(1, 21012320), (2, 10506160), (4, 5253080), (5, 4202464), (7, 3001760), (8, 2626540), (10, 2101232), (14, 1500880), (16, 1313270), (20, 1050616), (28, 750440), (32, 656635), (35, 600352), (40, 525308), (56, 375220), (70, 300176), (73, 287840), (80, 262654), (112, 187610), (140, 150088), (146, 143920), (160, 131327), (224, 93805), (257, 81760), (280, 75044), (292, 71960), (365, 57568), (511, 41120), (514, 40880), (560, 37522), (584, 35980), (730, 28784), (1022, 20560), (1028, 20440), (1120, 18761), (1168, 17990), (1285, 16352), (1460, 14392), (1799, 11680), (2044, 10280), (2056, 10220), (2336, 8995), (2555, 8224), (2570, 8176), (2920, 7196), (3598, 5840), (4088, 5140), (4112, 5110)]