21670640

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{269}}^1$

素因数の和:354

約数の個数: 80

約数和(自身を含む): 54237600

約数和(自身を除く): 32566960

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 53, 76, 80, 95, 106, 152, 190, 212, 265, 269, 304, 380, 424, 530, 538, 760, 848, 1007, 1060, 1076, 1345, 1520, 2014, 2120, 2152, 2690, 4028, 4240, 4304, 5035, 5111, 5380, 8056, 10070, 10222, 10760, 14257, 16112, 20140, 20444, 21520, 25555, 28514, 40280, 40888, 51110, 57028, 71285, 80560, 81776, 102220, 114056, 142570, 204440, 228112, 270883, 285140, 408880, 541766, 570280, 1083532, 1140560, 1354415, 2167064, 2708830, 4334128, 5417660, 10835320, 21670640]

約数ペア:

[(1, 21670640), (2, 10835320), (4, 5417660), (5, 4334128), (8, 2708830), (10, 2167064), (16, 1354415), (19, 1140560), (20, 1083532), (38, 570280), (40, 541766), (53, 408880), (76, 285140), (80, 270883), (95, 228112), (106, 204440), (152, 142570), (190, 114056), (212, 102220), (265, 81776), (269, 80560), (304, 71285), (380, 57028), (424, 51110), (530, 40888), (538, 40280), (760, 28514), (848, 25555), (1007, 21520), (1060, 20444), (1076, 20140), (1345, 16112), (1520, 14257), (2014, 10760), (2120, 10222), (2152, 10070), (2690, 8056), (4028, 5380), (4240, 5111), (4304, 5035)]