21771120

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{12959}}^1$

素因数の和:12982

約数の個数: 80

約数和(自身を含む): 77137920

約数和(自身を除く): 55366800

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 12959, 25918, 38877, 51836, 64795, 77754, 90713, 103672, 129590, 155508, 181426, 194385, 207344, 259180, 272139, 311016, 362852, 388770, 453565, 518360, 544278, 622032, 725704, 777540, 907130, 1036720, 1088556, 1360695, 1451408, 1555080, 1814260, 2177112, 2721390, 3110160, 3628520, 4354224, 5442780, 7257040, 10885560, 21771120]

約数ペア:

[(1, 21771120), (2, 10885560), (3, 7257040), (4, 5442780), (5, 4354224), (6, 3628520), (7, 3110160), (8, 2721390), (10, 2177112), (12, 1814260), (14, 1555080), (15, 1451408), (16, 1360695), (20, 1088556), (21, 1036720), (24, 907130), (28, 777540), (30, 725704), (35, 622032), (40, 544278), (42, 518360), (48, 453565), (56, 388770), (60, 362852), (70, 311016), (80, 272139), (84, 259180), (105, 207344), (112, 194385), (120, 181426), (140, 155508), (168, 129590), (210, 103672), (240, 90713), (280, 77754), (336, 64795), (420, 51836), (560, 38877), (840, 25918), (1680, 12959)]