20158656640

素因数分解:

$2^7\times 5^1\times {\mathrm{89}}^1\times {\mathrm{547}}^1\times {\mathrm{647}}^1$

素因数の和:1302

約数の個数: 128

約数和(自身を含む): 48897820800

約数和(自身を除く): 28739164160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 89, 128, 160, 178, 320, 356, 445, 547, 640, 647, 712, 890, 1094, 1294, 1424, 1780, 2188, 2588, 2735, 2848, 3235, 3560, 4376, 5176, 5470, 5696, 6470, 7120, 8752, 10352, 10940, 11392, 12940, 14240, 17504, 20704, 21880, 25880, 28480, 35008, 41408, 43760, 48683, 51760, 56960, 57583, 70016, 82816, 87520, 97366, 103520, 115166, 175040, 194732, 207040, 230332, 243415, 287915, 350080, 353909, 389464, 414080, 460664, 486830, 575830, 707818, 778928, 921328, 973660, 1151660, 1415636, 1557856, 1769545, 1842656, 1947320, 2303320, 2831272, 3115712, 3539090, 3685312, 3894640, 4606640, 5662544, 6231424, 7078180, 7370624, 7789280, 9213280, 11325088, 14156360, 15578560, 18426560, 22650176, 28312720, 31157120, 31497901, 36853120, 45300352, 56625440, 62995802, 113250880, 125991604, 157489505, 226501760, 251983208, 314979010, 503966416, 629958020, 1007932832, 1259916040, 2015865664, 2519832080, 4031731328, 5039664160, 10079328320, 20158656640]

約数ペア:

[(1, 20158656640), (2, 10079328320), (4, 5039664160), (5, 4031731328), (8, 2519832080), (10, 2015865664), (16, 1259916040), (20, 1007932832), (32, 629958020), (40, 503966416), (64, 314979010), (80, 251983208), (89, 226501760), (128, 157489505), (160, 125991604), (178, 113250880), (320, 62995802), (356, 56625440), (445, 45300352), (547, 36853120), (640, 31497901), (647, 31157120), (712, 28312720), (890, 22650176), (1094, 18426560), (1294, 15578560), (1424, 14156360), (1780, 11325088), (2188, 9213280), (2588, 7789280), (2735, 7370624), (2848, 7078180), (3235, 6231424), (3560, 5662544), (4376, 4606640), (5176, 3894640), (5470, 3685312), (5696, 3539090), (6470, 3115712), (7120, 2831272), (8752, 2303320), (10352, 1947320), (10940, 1842656), (11392, 1769545), (12940, 1557856), (14240, 1415636), (17504, 1151660), (20704, 973660), (21880, 921328), (25880, 778928), (28480, 707818), (35008, 575830), (41408, 486830), (43760, 460664), (48683, 414080), (51760, 389464), (56960, 353909), (57583, 350080), (70016, 287915), (82816, 243415), (87520, 230332), (97366, 207040), (103520, 194732), (115166, 175040)]