20757500

素因数分解:

$2^2\times 5^4\times {\mathrm{19}}^2\times {\mathrm{23}}^1$

素因数の和:85

約数の個数: 90

約数和(自身を含む): 49990248

約数和(自身を除く): 29232748

約数列:

[1, 2, 4, 5, 10, 19, 20, 23, 25, 38, 46, 50, 76, 92, 95, 100, 115, 125, 190, 230, 250, 361, 380, 437, 460, 475, 500, 575, 625, 722, 874, 950, 1150, 1250, 1444, 1748, 1805, 1900, 2185, 2300, 2375, 2500, 2875, 3610, 4370, 4750, 5750, 7220, 8303, 8740, 9025, 9500, 10925, 11500, 11875, 14375, 16606, 18050, 21850, 23750, 28750, 33212, 36100, 41515, 43700, 45125, 47500, 54625, 57500, 83030, 90250, 109250, 166060, 180500, 207575, 218500, 225625, 273125, 415150, 451250, 546250, 830300, 902500, 1037875, 1092500, 2075750, 4151500, 5189375, 10378750, 20757500]

約数ペア:

[(1, 20757500), (2, 10378750), (4, 5189375), (5, 4151500), (10, 2075750), (19, 1092500), (20, 1037875), (23, 902500), (25, 830300), (38, 546250), (46, 451250), (50, 415150), (76, 273125), (92, 225625), (95, 218500), (100, 207575), (115, 180500), (125, 166060), (190, 109250), (230, 90250), (250, 83030), (361, 57500), (380, 54625), (437, 47500), (460, 45125), (475, 43700), (500, 41515), (575, 36100), (625, 33212), (722, 28750), (874, 23750), (950, 21850), (1150, 18050), (1250, 16606), (1444, 14375), (1748, 11875), (1805, 11500), (1900, 10925), (2185, 9500), (2300, 9025), (2375, 8740), (2500, 8303), (2875, 7220), (3610, 5750), (4370, 4750)]