28190780

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{1109}}^1$

素因数の和:1190

約数の個数: 48

約数和(自身を含む): 62657280

約数和(自身を除く): 34466500

約数列:

[1, 2, 4, 5, 10, 20, 31, 41, 62, 82, 124, 155, 164, 205, 310, 410, 620, 820, 1109, 1271, 2218, 2542, 4436, 5084, 5545, 6355, 11090, 12710, 22180, 25420, 34379, 45469, 68758, 90938, 137516, 171895, 181876, 227345, 343790, 454690, 687580, 909380, 1409539, 2819078, 5638156, 7047695, 14095390, 28190780]

約数ペア:

[(1, 28190780), (2, 14095390), (4, 7047695), (5, 5638156), (10, 2819078), (20, 1409539), (31, 909380), (41, 687580), (62, 454690), (82, 343790), (124, 227345), (155, 181876), (164, 171895), (205, 137516), (310, 90938), (410, 68758), (620, 45469), (820, 34379), (1109, 25420), (1271, 22180), (2218, 12710), (2542, 11090), (4436, 6355), (5084, 5545)]