21001185

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{197}}^1$

素因数の和:334

約数の個数: 48

約数和(自身を含む): 38548224

約数和(自身を除く): 17547039

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 103, 115, 197, 207, 309, 345, 515, 591, 927, 985, 1035, 1545, 1773, 2369, 2955, 4531, 4635, 7107, 8865, 11845, 13593, 20291, 21321, 22655, 35535, 40779, 60873, 67965, 101455, 106605, 182619, 203895, 304365, 466693, 913095, 1400079, 2333465, 4200237, 7000395, 21001185]

約数ペア:

[(1, 21001185), (3, 7000395), (5, 4200237), (9, 2333465), (15, 1400079), (23, 913095), (45, 466693), (69, 304365), (103, 203895), (115, 182619), (197, 106605), (207, 101455), (309, 67965), (345, 60873), (515, 40779), (591, 35535), (927, 22655), (985, 21321), (1035, 20291), (1545, 13593), (1773, 11845), (2369, 8865), (2955, 7107), (4531, 4635)]