28487120

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{4001}}^1$

素因数の和:4103

約数の個数: 40

約数和(自身を含む): 66993480

約数和(自身を除く): 38506360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 3560, 4001, 7120, 8002, 16004, 20005, 32008, 40010, 64016, 80020, 160040, 320080, 356089, 712178, 1424356, 1780445, 2848712, 3560890, 5697424, 7121780, 14243560, 28487120]

約数ペア:

[(1, 28487120), (2, 14243560), (4, 7121780), (5, 5697424), (8, 3560890), (10, 2848712), (16, 1780445), (20, 1424356), (40, 712178), (80, 356089), (89, 320080), (178, 160040), (356, 80020), (445, 64016), (712, 40010), (890, 32008), (1424, 20005), (1780, 16004), (3560, 8002), (4001, 7120)]