28101800

素因数分解:

$2^3\times 5^2\times {\mathrm{71}}^1\times {\mathrm{1979}}^1$

素因数の和:2066

約数の個数: 48

約数和(自身を含む): 66290400

約数和(自身を除く): 38188600

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 71, 100, 142, 200, 284, 355, 568, 710, 1420, 1775, 1979, 2840, 3550, 3958, 7100, 7916, 9895, 14200, 15832, 19790, 39580, 49475, 79160, 98950, 140509, 197900, 281018, 395800, 562036, 702545, 1124072, 1405090, 2810180, 3512725, 5620360, 7025450, 14050900, 28101800]

約数ペア:

[(1, 28101800), (2, 14050900), (4, 7025450), (5, 5620360), (8, 3512725), (10, 2810180), (20, 1405090), (25, 1124072), (40, 702545), (50, 562036), (71, 395800), (100, 281018), (142, 197900), (200, 140509), (284, 98950), (355, 79160), (568, 49475), (710, 39580), (1420, 19790), (1775, 15832), (1979, 14200), (2840, 9895), (3550, 7916), (3958, 7100)]