20498880

素因数分解:

$2^6\times 3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{163}}^1$

素因数の和:314

約数の個数: 112

約数和(自身を含む): 65983104

約数和(自身を除く): 45484224

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, 131, 160, 163, 192, 240, 262, 320, 326, 393, 480, 489, 524, 652, 655, 786, 815, 960, 978, 1048, 1304, 1310, 1572, 1630, 1956, 1965, 2096, 2445, 2608, 2620, 3144, 3260, 3912, 3930, 4192, 4890, 5216, 5240, 6288, 6520, 7824, 7860, 8384, 9780, 10432, 10480, 12576, 13040, 15648, 15720, 19560, 20960, 21353, 25152, 26080, 31296, 31440, 39120, 41920, 42706, 52160, 62880, 64059, 78240, 85412, 106765, 125760, 128118, 156480, 170824, 213530, 256236, 320295, 341648, 427060, 512472, 640590, 683296, 854120, 1024944, 1281180, 1366592, 1708240, 2049888, 2562360, 3416480, 4099776, 5124720, 6832960, 10249440, 20498880]

約数ペア:

[(1, 20498880), (2, 10249440), (3, 6832960), (4, 5124720), (5, 4099776), (6, 3416480), (8, 2562360), (10, 2049888), (12, 1708240), (15, 1366592), (16, 1281180), (20, 1024944), (24, 854120), (30, 683296), (32, 640590), (40, 512472), (48, 427060), (60, 341648), (64, 320295), (80, 256236), (96, 213530), (120, 170824), (131, 156480), (160, 128118), (163, 125760), (192, 106765), (240, 85412), (262, 78240), (320, 64059), (326, 62880), (393, 52160), (480, 42706), (489, 41920), (524, 39120), (652, 31440), (655, 31296), (786, 26080), (815, 25152), (960, 21353), (978, 20960), (1048, 19560), (1304, 15720), (1310, 15648), (1572, 13040), (1630, 12576), (1956, 10480), (1965, 10432), (2096, 9780), (2445, 8384), (2608, 7860), (2620, 7824), (3144, 6520), (3260, 6288), (3912, 5240), (3930, 5216), (4192, 4890)]