20254720

素因数分解:

$2^{12}\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1$

素因数の和:95

約数の個数: 104

約数和(自身を含む): 51898176

約数和(自身を除く): 31643456

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 43, 46, 64, 80, 86, 92, 115, 128, 160, 172, 184, 215, 230, 256, 320, 344, 368, 430, 460, 512, 640, 688, 736, 860, 920, 989, 1024, 1280, 1376, 1472, 1720, 1840, 1978, 2048, 2560, 2752, 2944, 3440, 3680, 3956, 4096, 4945, 5120, 5504, 5888, 6880, 7360, 7912, 9890, 10240, 11008, 11776, 13760, 14720, 15824, 19780, 20480, 22016, 23552, 27520, 29440, 31648, 39560, 44032, 47104, 55040, 58880, 63296, 79120, 88064, 94208, 110080, 117760, 126592, 158240, 176128, 220160, 235520, 253184, 316480, 440320, 471040, 506368, 632960, 880640, 1012736, 1265920, 2025472, 2531840, 4050944, 5063680, 10127360, 20254720]

約数ペア:

[(1, 20254720), (2, 10127360), (4, 5063680), (5, 4050944), (8, 2531840), (10, 2025472), (16, 1265920), (20, 1012736), (23, 880640), (32, 632960), (40, 506368), (43, 471040), (46, 440320), (64, 316480), (80, 253184), (86, 235520), (92, 220160), (115, 176128), (128, 158240), (160, 126592), (172, 117760), (184, 110080), (215, 94208), (230, 88064), (256, 79120), (320, 63296), (344, 58880), (368, 55040), (430, 47104), (460, 44032), (512, 39560), (640, 31648), (688, 29440), (736, 27520), (860, 23552), (920, 22016), (989, 20480), (1024, 19780), (1280, 15824), (1376, 14720), (1472, 13760), (1720, 11776), (1840, 11008), (1978, 10240), (2048, 9890), (2560, 7912), (2752, 7360), (2944, 6880), (3440, 5888), (3680, 5504), (3956, 5120), (4096, 4945)]