21355740

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{997}}^1$

素因数の和:1036

約数の個数: 144

約数和(自身を含む): 78466752

約数和(自身を除く): 57111012

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 17, 18, 20, 21, 28, 30, 34, 35, 36, 42, 45, 51, 60, 63, 68, 70, 84, 85, 90, 102, 105, 119, 126, 140, 153, 170, 180, 204, 210, 238, 252, 255, 306, 315, 340, 357, 420, 476, 510, 595, 612, 630, 714, 765, 997, 1020, 1071, 1190, 1260, 1428, 1530, 1785, 1994, 2142, 2380, 2991, 3060, 3570, 3988, 4284, 4985, 5355, 5982, 6979, 7140, 8973, 9970, 10710, 11964, 13958, 14955, 16949, 17946, 19940, 20937, 21420, 27916, 29910, 33898, 34895, 35892, 41874, 44865, 50847, 59820, 62811, 67796, 69790, 83748, 84745, 89730, 101694, 104685, 118643, 125622, 139580, 152541, 169490, 179460, 203388, 209370, 237286, 251244, 254235, 305082, 314055, 338980, 355929, 418740, 474572, 508470, 593215, 610164, 628110, 711858, 762705, 1016940, 1067787, 1186430, 1256220, 1423716, 1525410, 1779645, 2135574, 2372860, 3050820, 3559290, 4271148, 5338935, 7118580, 10677870, 21355740]

約数ペア:

[(1, 21355740), (2, 10677870), (3, 7118580), (4, 5338935), (5, 4271148), (6, 3559290), (7, 3050820), (9, 2372860), (10, 2135574), (12, 1779645), (14, 1525410), (15, 1423716), (17, 1256220), (18, 1186430), (20, 1067787), (21, 1016940), (28, 762705), (30, 711858), (34, 628110), (35, 610164), (36, 593215), (42, 508470), (45, 474572), (51, 418740), (60, 355929), (63, 338980), (68, 314055), (70, 305082), (84, 254235), (85, 251244), (90, 237286), (102, 209370), (105, 203388), (119, 179460), (126, 169490), (140, 152541), (153, 139580), (170, 125622), (180, 118643), (204, 104685), (210, 101694), (238, 89730), (252, 84745), (255, 83748), (306, 69790), (315, 67796), (340, 62811), (357, 59820), (420, 50847), (476, 44865), (510, 41874), (595, 35892), (612, 34895), (630, 33898), (714, 29910), (765, 27916), (997, 21420), (1020, 20937), (1071, 19940), (1190, 17946), (1260, 16949), (1428, 14955), (1530, 13958), (1785, 11964), (1994, 10710), (2142, 9970), (2380, 8973), (2991, 7140), (3060, 6979), (3570, 5982), (3988, 5355), (4284, 4985)]