209856980

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{271}}^1\times {\mathrm{1249}}^1$

素因数の和:1560

約数の個数: 48

約数和(自身を含む): 456960000

約数和(自身を除く): 247103020

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 271, 310, 542, 620, 1084, 1249, 1355, 2498, 2710, 4996, 5420, 6245, 8401, 12490, 16802, 24980, 33604, 38719, 42005, 77438, 84010, 154876, 168020, 193595, 338479, 387190, 676958, 774380, 1353916, 1692395, 3384790, 6769580, 10492849, 20985698, 41971396, 52464245, 104928490, 209856980]

約数ペア:

[(1, 209856980), (2, 104928490), (4, 52464245), (5, 41971396), (10, 20985698), (20, 10492849), (31, 6769580), (62, 3384790), (124, 1692395), (155, 1353916), (271, 774380), (310, 676958), (542, 387190), (620, 338479), (1084, 193595), (1249, 168020), (1355, 154876), (2498, 84010), (2710, 77438), (4996, 42005), (5420, 38719), (6245, 33604), (8401, 24980), (12490, 16802)]