21387870

素因数分解:

$2^1\times 3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{1997}}^1$

素因数の和:2034

約数の個数: 96

約数和(自身を含む): 67324608

約数和(自身を除く): 45936738

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 17, 18, 21, 30, 34, 35, 42, 45, 51, 63, 70, 85, 90, 102, 105, 119, 126, 153, 170, 210, 238, 255, 306, 315, 357, 510, 595, 630, 714, 765, 1071, 1190, 1530, 1785, 1997, 2142, 3570, 3994, 5355, 5991, 9985, 10710, 11982, 13979, 17973, 19970, 27958, 29955, 33949, 35946, 41937, 59910, 67898, 69895, 83874, 89865, 101847, 125811, 139790, 169745, 179730, 203694, 209685, 237643, 251622, 305541, 339490, 419370, 475286, 509235, 611082, 629055, 712929, 1018470, 1188215, 1258110, 1425858, 1527705, 2138787, 2376430, 3055410, 3564645, 4277574, 7129290, 10693935, 21387870]

約数ペア:

[(1, 21387870), (2, 10693935), (3, 7129290), (5, 4277574), (6, 3564645), (7, 3055410), (9, 2376430), (10, 2138787), (14, 1527705), (15, 1425858), (17, 1258110), (18, 1188215), (21, 1018470), (30, 712929), (34, 629055), (35, 611082), (42, 509235), (45, 475286), (51, 419370), (63, 339490), (70, 305541), (85, 251622), (90, 237643), (102, 209685), (105, 203694), (119, 179730), (126, 169745), (153, 139790), (170, 125811), (210, 101847), (238, 89865), (255, 83874), (306, 69895), (315, 67898), (357, 59910), (510, 41937), (595, 35946), (630, 33949), (714, 29955), (765, 27958), (1071, 19970), (1190, 17973), (1530, 13979), (1785, 11982), (1997, 10710), (2142, 9985), (3570, 5991), (3994, 5355)]