19689580

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{16139}}^1$

素因数の和:16209

約数の個数: 24

約数和(自身を含む): 42028560

約数和(自身を除く): 22338980

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 16139, 32278, 64556, 80695, 161390, 322780, 984479, 1968958, 3937916, 4922395, 9844790, 19689580]

約数ペア:

[(1, 19689580), (2, 9844790), (4, 4922395), (5, 3937916), (10, 1968958), (20, 984479), (61, 322780), (122, 161390), (244, 80695), (305, 64556), (610, 32278), (1220, 16139)]