15981225

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{443}}^1$

素因数の和:506

約数の個数: 48

約数和(自身を含む): 29289792

約数和(自身を除く): 13308567

約数列:

[1, 3, 5, 13, 15, 25, 37, 39, 65, 75, 111, 185, 195, 325, 443, 481, 555, 925, 975, 1329, 1443, 2215, 2405, 2775, 5759, 6645, 7215, 11075, 12025, 16391, 17277, 28795, 33225, 36075, 49173, 81955, 86385, 143975, 213083, 245865, 409775, 431925, 639249, 1065415, 1229325, 3196245, 5327075, 15981225]

約数ペア:

[(1, 15981225), (3, 5327075), (5, 3196245), (13, 1229325), (15, 1065415), (25, 639249), (37, 431925), (39, 409775), (65, 245865), (75, 213083), (111, 143975), (185, 86385), (195, 81955), (325, 49173), (443, 36075), (481, 33225), (555, 28795), (925, 17277), (975, 16391), (1329, 12025), (1443, 11075), (2215, 7215), (2405, 6645), (2775, 5759)]