79990000

素因数分解:

$2^4\times 5^4\times {\mathrm{19}}^1\times {\mathrm{421}}^1$

素因数の和:468

約数の個数: 100

約数和(自身を含む): 204340840

約数和(自身を除く): 124350840

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 25, 38, 40, 50, 76, 80, 95, 100, 125, 152, 190, 200, 250, 304, 380, 400, 421, 475, 500, 625, 760, 842, 950, 1000, 1250, 1520, 1684, 1900, 2000, 2105, 2375, 2500, 3368, 3800, 4210, 4750, 5000, 6736, 7600, 7999, 8420, 9500, 10000, 10525, 11875, 15998, 16840, 19000, 21050, 23750, 31996, 33680, 38000, 39995, 42100, 47500, 52625, 63992, 79990, 84200, 95000, 105250, 127984, 159980, 168400, 190000, 199975, 210500, 263125, 319960, 399950, 421000, 526250, 639920, 799900, 842000, 999875, 1052500, 1599800, 1999750, 2105000, 3199600, 3999500, 4210000, 4999375, 7999000, 9998750, 15998000, 19997500, 39995000, 79990000]

約数ペア:

[(1, 79990000), (2, 39995000), (4, 19997500), (5, 15998000), (8, 9998750), (10, 7999000), (16, 4999375), (19, 4210000), (20, 3999500), (25, 3199600), (38, 2105000), (40, 1999750), (50, 1599800), (76, 1052500), (80, 999875), (95, 842000), (100, 799900), (125, 639920), (152, 526250), (190, 421000), (200, 399950), (250, 319960), (304, 263125), (380, 210500), (400, 199975), (421, 190000), (475, 168400), (500, 159980), (625, 127984), (760, 105250), (842, 95000), (950, 84200), (1000, 79990), (1250, 63992), (1520, 52625), (1684, 47500), (1900, 42100), (2000, 39995), (2105, 38000), (2375, 33680), (2500, 31996), (3368, 23750), (3800, 21050), (4210, 19000), (4750, 16840), (5000, 15998), (6736, 11875), (7600, 10525), (7999, 10000), (8420, 9500)]