21000916540

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{313}}^1\times {\mathrm{25609}}^1$

素因数の和:26062

約数の個数: 48

約数和(自身を含む): 44582297760

約数和(自身を除く): 23581381220

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 313, 524, 626, 655, 1252, 1310, 1565, 2620, 3130, 6260, 25609, 41003, 51218, 82006, 102436, 128045, 164012, 205015, 256090, 410030, 512180, 820060, 3354779, 6709558, 8015617, 13419116, 16031234, 16773895, 32062468, 33547790, 40078085, 67095580, 80156170, 160312340, 1050045827, 2100091654, 4200183308, 5250229135, 10500458270, 21000916540]

約数ペア:

[(1, 21000916540), (2, 10500458270), (4, 5250229135), (5, 4200183308), (10, 2100091654), (20, 1050045827), (131, 160312340), (262, 80156170), (313, 67095580), (524, 40078085), (626, 33547790), (655, 32062468), (1252, 16773895), (1310, 16031234), (1565, 13419116), (2620, 8015617), (3130, 6709558), (6260, 3354779), (25609, 820060), (41003, 512180), (51218, 410030), (82006, 256090), (102436, 205015), (128045, 164012)]