21575680

素因数分解:

$2^{11}\times 5^1\times 7^2\times {\mathrm{43}}^1$

素因数の和:84

約数の個数: 144

約数和(自身を含む): 61621560

約数和(自身を除く): 40045880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 43, 49, 56, 64, 70, 80, 86, 98, 112, 128, 140, 160, 172, 196, 215, 224, 245, 256, 280, 301, 320, 344, 392, 430, 448, 490, 512, 560, 602, 640, 688, 784, 860, 896, 980, 1024, 1120, 1204, 1280, 1376, 1505, 1568, 1720, 1792, 1960, 2048, 2107, 2240, 2408, 2560, 2752, 3010, 3136, 3440, 3584, 3920, 4214, 4480, 4816, 5120, 5504, 6020, 6272, 6880, 7168, 7840, 8428, 8960, 9632, 10240, 10535, 11008, 12040, 12544, 13760, 14336, 15680, 16856, 17920, 19264, 21070, 22016, 24080, 25088, 27520, 31360, 33712, 35840, 38528, 42140, 44032, 48160, 50176, 55040, 62720, 67424, 71680, 77056, 84280, 88064, 96320, 100352, 110080, 125440, 134848, 154112, 168560, 192640, 220160, 250880, 269696, 308224, 337120, 385280, 440320, 501760, 539392, 616448, 674240, 770560, 1078784, 1348480, 1541120, 2157568, 2696960, 3082240, 4315136, 5393920, 10787840, 21575680]

約数ペア:

[(1, 21575680), (2, 10787840), (4, 5393920), (5, 4315136), (7, 3082240), (8, 2696960), (10, 2157568), (14, 1541120), (16, 1348480), (20, 1078784), (28, 770560), (32, 674240), (35, 616448), (40, 539392), (43, 501760), (49, 440320), (56, 385280), (64, 337120), (70, 308224), (80, 269696), (86, 250880), (98, 220160), (112, 192640), (128, 168560), (140, 154112), (160, 134848), (172, 125440), (196, 110080), (215, 100352), (224, 96320), (245, 88064), (256, 84280), (280, 77056), (301, 71680), (320, 67424), (344, 62720), (392, 55040), (430, 50176), (448, 48160), (490, 44032), (512, 42140), (560, 38528), (602, 35840), (640, 33712), (688, 31360), (784, 27520), (860, 25088), (896, 24080), (980, 22016), (1024, 21070), (1120, 19264), (1204, 17920), (1280, 16856), (1376, 15680), (1505, 14336), (1568, 13760), (1720, 12544), (1792, 12040), (1960, 11008), (2048, 10535), (2107, 10240), (2240, 9632), (2408, 8960), (2560, 8428), (2752, 7840), (3010, 7168), (3136, 6880), (3440, 6272), (3584, 6020), (3920, 5504), (4214, 5120), (4480, 4816)]