21019460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13649}}^1$

素因数の和:13676

約数の個数: 48

約数和(自身を含む): 55036800

約数和(自身を除く): 34017340

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 13649, 27298, 54596, 68245, 95543, 136490, 150139, 191086, 272980, 300278, 382172, 477715, 600556, 750695, 955430, 1050973, 1501390, 1910860, 2101946, 3002780, 4203892, 5254865, 10509730, 21019460]

約数ペア:

[(1, 21019460), (2, 10509730), (4, 5254865), (5, 4203892), (7, 3002780), (10, 2101946), (11, 1910860), (14, 1501390), (20, 1050973), (22, 955430), (28, 750695), (35, 600556), (44, 477715), (55, 382172), (70, 300278), (77, 272980), (110, 191086), (140, 150139), (154, 136490), (220, 95543), (308, 68245), (385, 54596), (770, 27298), (1540, 13649)]