21307545

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{173}}^1$

素因数の和:231

約数の個数: 96

約数和(自身を含む): 46904832

約数和(自身を除く): 25597287

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 23, 35, 45, 51, 63, 69, 85, 105, 115, 119, 153, 161, 173, 207, 255, 315, 345, 357, 391, 483, 519, 595, 765, 805, 865, 1035, 1071, 1173, 1211, 1449, 1557, 1785, 1955, 2415, 2595, 2737, 2941, 3519, 3633, 3979, 5355, 5865, 6055, 7245, 7785, 8211, 8823, 10899, 11937, 13685, 14705, 17595, 18165, 19895, 20587, 24633, 26469, 27853, 35811, 41055, 44115, 54495, 59685, 61761, 67643, 83559, 102935, 123165, 132345, 139265, 179055, 185283, 202929, 250677, 308805, 338215, 417795, 473501, 608787, 926415, 1014645, 1253385, 1420503, 2367505, 3043935, 4261509, 7102515, 21307545]

約数ペア:

[(1, 21307545), (3, 7102515), (5, 4261509), (7, 3043935), (9, 2367505), (15, 1420503), (17, 1253385), (21, 1014645), (23, 926415), (35, 608787), (45, 473501), (51, 417795), (63, 338215), (69, 308805), (85, 250677), (105, 202929), (115, 185283), (119, 179055), (153, 139265), (161, 132345), (173, 123165), (207, 102935), (255, 83559), (315, 67643), (345, 61761), (357, 59685), (391, 54495), (483, 44115), (519, 41055), (595, 35811), (765, 27853), (805, 26469), (865, 24633), (1035, 20587), (1071, 19895), (1173, 18165), (1211, 17595), (1449, 14705), (1557, 13685), (1785, 11937), (1955, 10899), (2415, 8823), (2595, 8211), (2737, 7785), (2941, 7245), (3519, 6055), (3633, 5865), (3979, 5355)]