1771980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{4219}}^1$

素因数の和:4238

約数の個数: 48

約数和(自身を含む): 5671680

約数和(自身を除く): 3899700

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 4219, 8438, 12657, 16876, 21095, 25314, 29533, 42190, 50628, 59066, 63285, 84380, 88599, 118132, 126570, 147665, 177198, 253140, 295330, 354396, 442995, 590660, 885990, 1771980]

約数ペア:

[(1, 1771980), (2, 885990), (3, 590660), (4, 442995), (5, 354396), (6, 295330), (7, 253140), (10, 177198), (12, 147665), (14, 126570), (15, 118132), (20, 88599), (21, 84380), (28, 63285), (30, 59066), (35, 50628), (42, 42190), (60, 29533), (70, 25314), (84, 21095), (105, 16876), (140, 12657), (210, 8438), (420, 4219)]