21570705

素因数分解:

$3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{241}}^1$

素因数の和:288

約数の個数: 80

約数和(自身を含む): 44274384

約数和(自身を除く): 22703679

約数列:

[1, 3, 5, 9, 13, 15, 17, 27, 39, 45, 51, 65, 81, 85, 117, 135, 153, 195, 221, 241, 255, 351, 405, 459, 585, 663, 723, 765, 1053, 1105, 1205, 1377, 1755, 1989, 2169, 2295, 3133, 3315, 3615, 4097, 5265, 5967, 6507, 6885, 9399, 9945, 10845, 12291, 15665, 17901, 19521, 20485, 28197, 29835, 32535, 36873, 46995, 53261, 61455, 84591, 89505, 97605, 110619, 140985, 159783, 184365, 253773, 266305, 331857, 422955, 479349, 553095, 798915, 1268865, 1438047, 1659285, 2396745, 4314141, 7190235, 21570705]

約数ペア:

[(1, 21570705), (3, 7190235), (5, 4314141), (9, 2396745), (13, 1659285), (15, 1438047), (17, 1268865), (27, 798915), (39, 553095), (45, 479349), (51, 422955), (65, 331857), (81, 266305), (85, 253773), (117, 184365), (135, 159783), (153, 140985), (195, 110619), (221, 97605), (241, 89505), (255, 84591), (351, 61455), (405, 53261), (459, 46995), (585, 36873), (663, 32535), (723, 29835), (765, 28197), (1053, 20485), (1105, 19521), (1205, 17901), (1377, 15665), (1755, 12291), (1989, 10845), (2169, 9945), (2295, 9399), (3133, 6885), (3315, 6507), (3615, 5967), (4097, 5265)]