21750720

素因数分解:

$2^6\times 3^1\times 5^1\times {\mathrm{139}}^1\times {\mathrm{163}}^1$

素因数の和:322

約数の個数: 112

約数和(自身を含む): 69982080

約数和(自身を除く): 48231360

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, 139, 160, 163, 192, 240, 278, 320, 326, 417, 480, 489, 556, 652, 695, 815, 834, 960, 978, 1112, 1304, 1390, 1630, 1668, 1956, 2085, 2224, 2445, 2608, 2780, 3260, 3336, 3912, 4170, 4448, 4890, 5216, 5560, 6520, 6672, 7824, 8340, 8896, 9780, 10432, 11120, 13040, 13344, 15648, 16680, 19560, 22240, 22657, 26080, 26688, 31296, 33360, 39120, 44480, 45314, 52160, 66720, 67971, 78240, 90628, 113285, 133440, 135942, 156480, 181256, 226570, 271884, 339855, 362512, 453140, 543768, 679710, 725024, 906280, 1087536, 1359420, 1450048, 1812560, 2175072, 2718840, 3625120, 4350144, 5437680, 7250240, 10875360, 21750720]

約数ペア:

[(1, 21750720), (2, 10875360), (3, 7250240), (4, 5437680), (5, 4350144), (6, 3625120), (8, 2718840), (10, 2175072), (12, 1812560), (15, 1450048), (16, 1359420), (20, 1087536), (24, 906280), (30, 725024), (32, 679710), (40, 543768), (48, 453140), (60, 362512), (64, 339855), (80, 271884), (96, 226570), (120, 181256), (139, 156480), (160, 135942), (163, 133440), (192, 113285), (240, 90628), (278, 78240), (320, 67971), (326, 66720), (417, 52160), (480, 45314), (489, 44480), (556, 39120), (652, 33360), (695, 31296), (815, 26688), (834, 26080), (960, 22657), (978, 22240), (1112, 19560), (1304, 16680), (1390, 15648), (1630, 13344), (1668, 13040), (1956, 11120), (2085, 10432), (2224, 9780), (2445, 8896), (2608, 8340), (2780, 7824), (3260, 6672), (3336, 6520), (3912, 5560), (4170, 5216), (4448, 4890)]