81995520

素因数分解:

$2^8\times 3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{163}}^1$

素因数の和:318

約数の個数: 144

約数和(自身を含む): 265491072

約数和(自身を除く): 183495552

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 80, 96, 120, 128, 131, 160, 163, 192, 240, 256, 262, 320, 326, 384, 393, 480, 489, 524, 640, 652, 655, 768, 786, 815, 960, 978, 1048, 1280, 1304, 1310, 1572, 1630, 1920, 1956, 1965, 2096, 2445, 2608, 2620, 3144, 3260, 3840, 3912, 3930, 4192, 4890, 5216, 5240, 6288, 6520, 7824, 7860, 8384, 9780, 10432, 10480, 12576, 13040, 15648, 15720, 16768, 19560, 20864, 20960, 21353, 25152, 26080, 31296, 31440, 33536, 39120, 41728, 41920, 42706, 50304, 52160, 62592, 62880, 64059, 78240, 83840, 85412, 100608, 104320, 106765, 125184, 125760, 128118, 156480, 167680, 170824, 208640, 213530, 251520, 256236, 312960, 320295, 341648, 427060, 503040, 512472, 625920, 640590, 683296, 854120, 1024944, 1281180, 1366592, 1708240, 2049888, 2562360, 2733184, 3416480, 4099776, 5124720, 5466368, 6832960, 8199552, 10249440, 13665920, 16399104, 20498880, 27331840, 40997760, 81995520]

約数ペア:

[(1, 81995520), (2, 40997760), (3, 27331840), (4, 20498880), (5, 16399104), (6, 13665920), (8, 10249440), (10, 8199552), (12, 6832960), (15, 5466368), (16, 5124720), (20, 4099776), (24, 3416480), (30, 2733184), (32, 2562360), (40, 2049888), (48, 1708240), (60, 1366592), (64, 1281180), (80, 1024944), (96, 854120), (120, 683296), (128, 640590), (131, 625920), (160, 512472), (163, 503040), (192, 427060), (240, 341648), (256, 320295), (262, 312960), (320, 256236), (326, 251520), (384, 213530), (393, 208640), (480, 170824), (489, 167680), (524, 156480), (640, 128118), (652, 125760), (655, 125184), (768, 106765), (786, 104320), (815, 100608), (960, 85412), (978, 83840), (1048, 78240), (1280, 64059), (1304, 62880), (1310, 62592), (1572, 52160), (1630, 50304), (1920, 42706), (1956, 41920), (1965, 41728), (2096, 39120), (2445, 33536), (2608, 31440), (2620, 31296), (3144, 26080), (3260, 25152), (3840, 21353), (3912, 20960), (3930, 20864), (4192, 19560), (4890, 16768), (5216, 15720), (5240, 15648), (6288, 13040), (6520, 12576), (7824, 10480), (7860, 10432), (8384, 9780)]