7999000

素因数分解:

$2^3\times 5^3\times {\mathrm{19}}^1\times {\mathrm{421}}^1$

素因数の和:461

約数の個数: 64

約数和(自身を含む): 19749600

約数和(自身を除く): 11750600

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 25, 38, 40, 50, 76, 95, 100, 125, 152, 190, 200, 250, 380, 421, 475, 500, 760, 842, 950, 1000, 1684, 1900, 2105, 2375, 3368, 3800, 4210, 4750, 7999, 8420, 9500, 10525, 15998, 16840, 19000, 21050, 31996, 39995, 42100, 52625, 63992, 79990, 84200, 105250, 159980, 199975, 210500, 319960, 399950, 421000, 799900, 999875, 1599800, 1999750, 3999500, 7999000]

約数ペア:

[(1, 7999000), (2, 3999500), (4, 1999750), (5, 1599800), (8, 999875), (10, 799900), (19, 421000), (20, 399950), (25, 319960), (38, 210500), (40, 199975), (50, 159980), (76, 105250), (95, 84200), (100, 79990), (125, 63992), (152, 52625), (190, 42100), (200, 39995), (250, 31996), (380, 21050), (421, 19000), (475, 16840), (500, 15998), (760, 10525), (842, 9500), (950, 8420), (1000, 7999), (1684, 4750), (1900, 4210), (2105, 3800), (2375, 3368)]