211020520

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{1109}}^1$

素因数の和:1258

約数の個数: 64

約数和(自身を含む): 489110400

約数和(自身を除く): 278089880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 71, 134, 142, 268, 284, 335, 355, 536, 568, 670, 710, 1109, 1340, 1420, 2218, 2680, 2840, 4436, 4757, 5545, 8872, 9514, 11090, 19028, 22180, 23785, 38056, 44360, 47570, 74303, 78739, 95140, 148606, 157478, 190280, 297212, 314956, 371515, 393695, 594424, 629912, 743030, 787390, 1486060, 1574780, 2972120, 3149560, 5275513, 10551026, 21102052, 26377565, 42204104, 52755130, 105510260, 211020520]

約数ペア:

[(1, 211020520), (2, 105510260), (4, 52755130), (5, 42204104), (8, 26377565), (10, 21102052), (20, 10551026), (40, 5275513), (67, 3149560), (71, 2972120), (134, 1574780), (142, 1486060), (268, 787390), (284, 743030), (335, 629912), (355, 594424), (536, 393695), (568, 371515), (670, 314956), (710, 297212), (1109, 190280), (1340, 157478), (1420, 148606), (2218, 95140), (2680, 78739), (2840, 74303), (4436, 47570), (4757, 44360), (5545, 38056), (8872, 23785), (9514, 22180), (11090, 19028)]