18745545

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{443}}^1$

素因数の和:502

約数の個数: 64

約数和(自身を含む): 38191104

約数和(自身を除く): 19445559

約数列:

[1, 3, 5, 7, 13, 15, 21, 31, 35, 39, 65, 91, 93, 105, 155, 195, 217, 273, 403, 443, 455, 465, 651, 1085, 1209, 1329, 1365, 2015, 2215, 2821, 3101, 3255, 5759, 6045, 6645, 8463, 9303, 13733, 14105, 15505, 17277, 28795, 40313, 41199, 42315, 46515, 68665, 86385, 96131, 120939, 178529, 201565, 205995, 288393, 480655, 535587, 604695, 892645, 1249703, 1441965, 2677935, 3749109, 6248515, 18745545]

約数ペア:

[(1, 18745545), (3, 6248515), (5, 3749109), (7, 2677935), (13, 1441965), (15, 1249703), (21, 892645), (31, 604695), (35, 535587), (39, 480655), (65, 288393), (91, 205995), (93, 201565), (105, 178529), (155, 120939), (195, 96131), (217, 86385), (273, 68665), (403, 46515), (443, 42315), (455, 41199), (465, 40313), (651, 28795), (1085, 17277), (1209, 15505), (1329, 14105), (1365, 13733), (2015, 9303), (2215, 8463), (2821, 6645), (3101, 6045), (3255, 5759)]