31981131

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2297}}^1$

素因数の和:2340

約数の個数: 48

約数和(自身を含む): 60225984

約数和(自身を除く): 28244853

約数列:

[1, 3, 7, 9, 13, 17, 21, 39, 51, 63, 91, 117, 119, 153, 221, 273, 357, 663, 819, 1071, 1547, 1989, 2297, 4641, 6891, 13923, 16079, 20673, 29861, 39049, 48237, 89583, 117147, 144711, 209027, 268749, 273343, 351441, 507637, 627081, 820029, 1522911, 1881243, 2460087, 3553459, 4568733, 10660377, 31981131]

約数ペア:

[(1, 31981131), (3, 10660377), (7, 4568733), (9, 3553459), (13, 2460087), (17, 1881243), (21, 1522911), (39, 820029), (51, 627081), (63, 507637), (91, 351441), (117, 273343), (119, 268749), (153, 209027), (221, 144711), (273, 117147), (357, 89583), (663, 48237), (819, 39049), (1071, 29861), (1547, 20673), (1989, 16079), (2297, 13923), (4641, 6891)]