31538480

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{20749}}^1$

素因数の和:20781

約数の個数: 40

約数和(自身を含む): 77190000

約数和(自身を除く): 45651520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 20749, 41498, 82996, 103745, 165992, 207490, 331984, 394231, 414980, 788462, 829960, 1576924, 1659920, 1971155, 3153848, 3942310, 6307696, 7884620, 15769240, 31538480]

約数ペア:

[(1, 31538480), (2, 15769240), (4, 7884620), (5, 6307696), (8, 3942310), (10, 3153848), (16, 1971155), (19, 1659920), (20, 1576924), (38, 829960), (40, 788462), (76, 414980), (80, 394231), (95, 331984), (152, 207490), (190, 165992), (304, 103745), (380, 82996), (760, 41498), (1520, 20749)]