18990825

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{593}}^1$

素因数の和:674

約数の個数: 48

約数和(自身を含む): 36533376

約数和(自身を除く): 17542551

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 61, 75, 105, 175, 183, 305, 427, 525, 593, 915, 1281, 1525, 1779, 2135, 2965, 4151, 4575, 6405, 8895, 10675, 12453, 14825, 20755, 32025, 36173, 44475, 62265, 103775, 108519, 180865, 253211, 311325, 542595, 759633, 904325, 1266055, 2712975, 3798165, 6330275, 18990825]

約数ペア:

[(1, 18990825), (3, 6330275), (5, 3798165), (7, 2712975), (15, 1266055), (21, 904325), (25, 759633), (35, 542595), (61, 311325), (75, 253211), (105, 180865), (175, 108519), (183, 103775), (305, 62265), (427, 44475), (525, 36173), (593, 32025), (915, 20755), (1281, 14825), (1525, 12453), (1779, 10675), (2135, 8895), (2965, 6405), (4151, 4575)]