204889240

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{131}}^1\times {\mathrm{641}}^1$

素因数の和:844

約数の個数: 64

約数和(自身を含む): 472871520

約数和(自身を除く): 267982280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 131, 244, 262, 305, 488, 524, 610, 641, 655, 1048, 1220, 1282, 1310, 2440, 2564, 2620, 3205, 5128, 5240, 6410, 7991, 12820, 15982, 25640, 31964, 39101, 39955, 63928, 78202, 79910, 83971, 156404, 159820, 167942, 195505, 312808, 319640, 335884, 391010, 419855, 671768, 782020, 839710, 1564040, 1679420, 3358840, 5122231, 10244462, 20488924, 25611155, 40977848, 51222310, 102444620, 204889240]

約数ペア:

[(1, 204889240), (2, 102444620), (4, 51222310), (5, 40977848), (8, 25611155), (10, 20488924), (20, 10244462), (40, 5122231), (61, 3358840), (122, 1679420), (131, 1564040), (244, 839710), (262, 782020), (305, 671768), (488, 419855), (524, 391010), (610, 335884), (641, 319640), (655, 312808), (1048, 195505), (1220, 167942), (1282, 159820), (1310, 156404), (2440, 83971), (2564, 79910), (2620, 78202), (3205, 63928), (5128, 39955), (5240, 39101), (6410, 31964), (7991, 25640), (12820, 15982)]