2161390

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{401}}^1$

素因数の和:433

約数の個数: 48

約数和(自身を含む): 4949424

約数和(自身を除く): 2788034

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 49, 55, 70, 77, 98, 110, 154, 245, 385, 401, 490, 539, 770, 802, 1078, 2005, 2695, 2807, 4010, 4411, 5390, 5614, 8822, 14035, 19649, 22055, 28070, 30877, 39298, 44110, 61754, 98245, 154385, 196490, 216139, 308770, 432278, 1080695, 2161390]

約数ペア:

[(1, 2161390), (2, 1080695), (5, 432278), (7, 308770), (10, 216139), (11, 196490), (14, 154385), (22, 98245), (35, 61754), (49, 44110), (55, 39298), (70, 30877), (77, 28070), (98, 22055), (110, 19649), (154, 14035), (245, 8822), (385, 5614), (401, 5390), (490, 4411), (539, 4010), (770, 2807), (802, 2695), (1078, 2005)]