21971180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{1297}}^1$

素因数の和:1335

約数の個数: 72

約数和(自身を含む): 58005024

約数和(自身を除く): 36033844

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 121, 140, 154, 220, 242, 308, 385, 484, 605, 770, 847, 1210, 1297, 1540, 1694, 2420, 2594, 3388, 4235, 5188, 6485, 8470, 9079, 12970, 14267, 16940, 18158, 25940, 28534, 36316, 45395, 57068, 71335, 90790, 99869, 142670, 156937, 181580, 199738, 285340, 313874, 399476, 499345, 627748, 784685, 998690, 1098559, 1569370, 1997380, 2197118, 3138740, 4394236, 5492795, 10985590, 21971180]

約数ペア:

[(1, 21971180), (2, 10985590), (4, 5492795), (5, 4394236), (7, 3138740), (10, 2197118), (11, 1997380), (14, 1569370), (20, 1098559), (22, 998690), (28, 784685), (35, 627748), (44, 499345), (55, 399476), (70, 313874), (77, 285340), (110, 199738), (121, 181580), (140, 156937), (154, 142670), (220, 99869), (242, 90790), (308, 71335), (385, 57068), (484, 45395), (605, 36316), (770, 28534), (847, 25940), (1210, 18158), (1297, 16940), (1540, 14267), (1694, 12970), (2420, 9079), (2594, 8470), (3388, 6485), (4235, 5188)]