21191631

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{179}}^1$

素因数の和:299

約数の個数: 32

約数和(自身を含む): 31334400

約数和(自身を除く): 10142769

約数列:

[1, 3, 19, 31, 57, 67, 93, 179, 201, 537, 589, 1273, 1767, 2077, 3401, 3819, 5549, 6231, 10203, 11993, 16647, 35979, 39463, 105431, 118389, 227867, 316293, 371783, 683601, 1115349, 7063877, 21191631]

約数ペア:

[(1, 21191631), (3, 7063877), (19, 1115349), (31, 683601), (57, 371783), (67, 316293), (93, 227867), (179, 118389), (201, 105431), (537, 39463), (589, 35979), (1273, 16647), (1767, 11993), (2077, 10203), (3401, 6231), (3819, 5549)]