1621780

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{619}}^1$

素因数の和:759

約数の個数: 24

約数和(自身を含む): 3437280

約数和(自身を除く): 1815500

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 619, 655, 1238, 1310, 2476, 2620, 3095, 6190, 12380, 81089, 162178, 324356, 405445, 810890, 1621780]

約数ペア:

[(1, 1621780), (2, 810890), (4, 405445), (5, 324356), (10, 162178), (20, 81089), (131, 12380), (262, 6190), (524, 3095), (619, 2620), (655, 2476), (1238, 1310)]