19951580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{3943}}^1$

素因数の和:3986

約数の個数: 48

約数和(自身を含む): 47706624

約数和(自身を除く): 27755044

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 23, 44, 46, 55, 92, 110, 115, 220, 230, 253, 460, 506, 1012, 1265, 2530, 3943, 5060, 7886, 15772, 19715, 39430, 43373, 78860, 86746, 90689, 173492, 181378, 216865, 362756, 433730, 453445, 867460, 906890, 997579, 1813780, 1995158, 3990316, 4987895, 9975790, 19951580]

約数ペア:

[(1, 19951580), (2, 9975790), (4, 4987895), (5, 3990316), (10, 1995158), (11, 1813780), (20, 997579), (22, 906890), (23, 867460), (44, 453445), (46, 433730), (55, 362756), (92, 216865), (110, 181378), (115, 173492), (220, 90689), (230, 86746), (253, 78860), (460, 43373), (506, 39430), (1012, 19715), (1265, 15772), (2530, 7886), (3943, 5060)]