21143800

素因数分解:

$2^3\times 5^2\times {\mathrm{71}}^1\times {\mathrm{1489}}^1$

素因数の和:1576

約数の個数: 48

約数和(自身を含む): 49885200

約数和(自身を除く): 28741400

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 71, 100, 142, 200, 284, 355, 568, 710, 1420, 1489, 1775, 2840, 2978, 3550, 5956, 7100, 7445, 11912, 14200, 14890, 29780, 37225, 59560, 74450, 105719, 148900, 211438, 297800, 422876, 528595, 845752, 1057190, 2114380, 2642975, 4228760, 5285950, 10571900, 21143800]

約数ペア:

[(1, 21143800), (2, 10571900), (4, 5285950), (5, 4228760), (8, 2642975), (10, 2114380), (20, 1057190), (25, 845752), (40, 528595), (50, 422876), (71, 297800), (100, 211438), (142, 148900), (200, 105719), (284, 74450), (355, 59560), (568, 37225), (710, 29780), (1420, 14890), (1489, 14200), (1775, 11912), (2840, 7445), (2978, 7100), (3550, 5956)]