18961280

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1$

素因数の和:128

約数の個数: 128

約数和(自身を含む): 50893920

約数和(自身を除く): 31932640

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 43, 52, 53, 64, 65, 80, 86, 104, 106, 128, 130, 160, 172, 208, 212, 215, 260, 265, 320, 344, 416, 424, 430, 520, 530, 559, 640, 688, 689, 832, 848, 860, 1040, 1060, 1118, 1376, 1378, 1664, 1696, 1720, 2080, 2120, 2236, 2279, 2752, 2756, 2795, 3392, 3440, 3445, 4160, 4240, 4472, 4558, 5504, 5512, 5590, 6784, 6880, 6890, 8320, 8480, 8944, 9116, 11024, 11180, 11395, 13760, 13780, 16960, 17888, 18232, 22048, 22360, 22790, 27520, 27560, 29627, 33920, 35776, 36464, 44096, 44720, 45580, 55120, 59254, 71552, 72928, 88192, 89440, 91160, 110240, 118508, 145856, 148135, 178880, 182320, 220480, 237016, 291712, 296270, 357760, 364640, 440960, 474032, 592540, 729280, 948064, 1185080, 1458560, 1896128, 2370160, 3792256, 4740320, 9480640, 18961280]

約数ペア:

[(1, 18961280), (2, 9480640), (4, 4740320), (5, 3792256), (8, 2370160), (10, 1896128), (13, 1458560), (16, 1185080), (20, 948064), (26, 729280), (32, 592540), (40, 474032), (43, 440960), (52, 364640), (53, 357760), (64, 296270), (65, 291712), (80, 237016), (86, 220480), (104, 182320), (106, 178880), (128, 148135), (130, 145856), (160, 118508), (172, 110240), (208, 91160), (212, 89440), (215, 88192), (260, 72928), (265, 71552), (320, 59254), (344, 55120), (416, 45580), (424, 44720), (430, 44096), (520, 36464), (530, 35776), (559, 33920), (640, 29627), (688, 27560), (689, 27520), (832, 22790), (848, 22360), (860, 22048), (1040, 18232), (1060, 17888), (1118, 16960), (1376, 13780), (1378, 13760), (1664, 11395), (1696, 11180), (1720, 11024), (2080, 9116), (2120, 8944), (2236, 8480), (2279, 8320), (2752, 6890), (2756, 6880), (2795, 6784), (3392, 5590), (3440, 5512), (3445, 5504), (4160, 4558), (4240, 4472)]