18218240

素因数分解:

$2^8\times 5^1\times {\mathrm{43}}^1\times {\mathrm{331}}^1$

素因数の和:395

約数の個数: 72

約数和(自身を含む): 44788128

約数和(自身を除く): 26569888

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 64, 80, 86, 128, 160, 172, 215, 256, 320, 331, 344, 430, 640, 662, 688, 860, 1280, 1324, 1376, 1655, 1720, 2648, 2752, 3310, 3440, 5296, 5504, 6620, 6880, 10592, 11008, 13240, 13760, 14233, 21184, 26480, 27520, 28466, 42368, 52960, 55040, 56932, 71165, 84736, 105920, 113864, 142330, 211840, 227728, 284660, 423680, 455456, 569320, 910912, 1138640, 1821824, 2277280, 3643648, 4554560, 9109120, 18218240]

約数ペア:

[(1, 18218240), (2, 9109120), (4, 4554560), (5, 3643648), (8, 2277280), (10, 1821824), (16, 1138640), (20, 910912), (32, 569320), (40, 455456), (43, 423680), (64, 284660), (80, 227728), (86, 211840), (128, 142330), (160, 113864), (172, 105920), (215, 84736), (256, 71165), (320, 56932), (331, 55040), (344, 52960), (430, 42368), (640, 28466), (662, 27520), (688, 26480), (860, 21184), (1280, 14233), (1324, 13760), (1376, 13240), (1655, 11008), (1720, 10592), (2648, 6880), (2752, 6620), (3310, 5504), (3440, 5296)]