21558320

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{281}}^1$

素因数の和:438

約数の個数: 80

約数和(自身を含む): 57907008

約数和(自身を除く): 36348688

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 137, 140, 274, 280, 281, 548, 560, 562, 685, 959, 1096, 1124, 1370, 1405, 1918, 1967, 2192, 2248, 2740, 2810, 3836, 3934, 4496, 4795, 5480, 5620, 7672, 7868, 9590, 9835, 10960, 11240, 15344, 15736, 19180, 19670, 22480, 31472, 38360, 38497, 39340, 76720, 76994, 78680, 153988, 157360, 192485, 269479, 307976, 384970, 538958, 615952, 769940, 1077916, 1347395, 1539880, 2155832, 2694790, 3079760, 4311664, 5389580, 10779160, 21558320]

約数ペア:

[(1, 21558320), (2, 10779160), (4, 5389580), (5, 4311664), (7, 3079760), (8, 2694790), (10, 2155832), (14, 1539880), (16, 1347395), (20, 1077916), (28, 769940), (35, 615952), (40, 538958), (56, 384970), (70, 307976), (80, 269479), (112, 192485), (137, 157360), (140, 153988), (274, 78680), (280, 76994), (281, 76720), (548, 39340), (560, 38497), (562, 38360), (685, 31472), (959, 22480), (1096, 19670), (1124, 19180), (1370, 15736), (1405, 15344), (1918, 11240), (1967, 10960), (2192, 9835), (2248, 9590), (2740, 7868), (2810, 7672), (3836, 5620), (3934, 5480), (4496, 4795)]