20389500

素因数分解:

$2^2\times 3^2\times 5^3\times {\mathrm{23}}^1\times {\mathrm{197}}^1$

素因数の和:245

約数の個数: 144

約数和(自身を含む): 67459392

約数和(自身を除く): 47069892

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 23, 25, 30, 36, 45, 46, 50, 60, 69, 75, 90, 92, 100, 115, 125, 138, 150, 180, 197, 207, 225, 230, 250, 276, 300, 345, 375, 394, 414, 450, 460, 500, 575, 591, 690, 750, 788, 828, 900, 985, 1035, 1125, 1150, 1182, 1380, 1500, 1725, 1773, 1970, 2070, 2250, 2300, 2364, 2875, 2955, 3450, 3546, 3940, 4140, 4500, 4531, 4925, 5175, 5750, 5910, 6900, 7092, 8625, 8865, 9062, 9850, 10350, 11500, 11820, 13593, 14775, 17250, 17730, 18124, 19700, 20700, 22655, 24625, 25875, 27186, 29550, 34500, 35460, 40779, 44325, 45310, 49250, 51750, 54372, 59100, 67965, 73875, 81558, 88650, 90620, 98500, 103500, 113275, 135930, 147750, 163116, 177300, 203895, 221625, 226550, 271860, 295500, 339825, 407790, 443250, 453100, 566375, 679650, 815580, 886500, 1019475, 1132750, 1359300, 1699125, 2038950, 2265500, 3398250, 4077900, 5097375, 6796500, 10194750, 20389500]

約数ペア:

[(1, 20389500), (2, 10194750), (3, 6796500), (4, 5097375), (5, 4077900), (6, 3398250), (9, 2265500), (10, 2038950), (12, 1699125), (15, 1359300), (18, 1132750), (20, 1019475), (23, 886500), (25, 815580), (30, 679650), (36, 566375), (45, 453100), (46, 443250), (50, 407790), (60, 339825), (69, 295500), (75, 271860), (90, 226550), (92, 221625), (100, 203895), (115, 177300), (125, 163116), (138, 147750), (150, 135930), (180, 113275), (197, 103500), (207, 98500), (225, 90620), (230, 88650), (250, 81558), (276, 73875), (300, 67965), (345, 59100), (375, 54372), (394, 51750), (414, 49250), (450, 45310), (460, 44325), (500, 40779), (575, 35460), (591, 34500), (690, 29550), (750, 27186), (788, 25875), (828, 24625), (900, 22655), (985, 20700), (1035, 19700), (1125, 18124), (1150, 17730), (1182, 17250), (1380, 14775), (1500, 13593), (1725, 11820), (1773, 11500), (1970, 10350), (2070, 9850), (2250, 9062), (2300, 8865), (2364, 8625), (2875, 7092), (2955, 6900), (3450, 5910), (3546, 5750), (3940, 5175), (4140, 4925), (4500, 4531)]