20999000

素因数分解:

$2^3\times 5^3\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1$

素因数の和:138

約数の個数: 128

約数和(自身を含む): 56609280

約数和(自身を除く): 35610280

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 23, 25, 40, 44, 46, 50, 55, 83, 88, 92, 100, 110, 115, 125, 166, 184, 200, 220, 230, 250, 253, 275, 332, 415, 440, 460, 500, 506, 550, 575, 664, 830, 913, 920, 1000, 1012, 1100, 1150, 1265, 1375, 1660, 1826, 1909, 2024, 2075, 2200, 2300, 2530, 2750, 2875, 3320, 3652, 3818, 4150, 4565, 4600, 5060, 5500, 5750, 6325, 7304, 7636, 8300, 9130, 9545, 10120, 10375, 11000, 11500, 12650, 15272, 16600, 18260, 19090, 20750, 20999, 22825, 23000, 25300, 31625, 36520, 38180, 41500, 41998, 45650, 47725, 50600, 63250, 76360, 83000, 83996, 91300, 95450, 104995, 114125, 126500, 167992, 182600, 190900, 209990, 228250, 238625, 253000, 381800, 419980, 456500, 477250, 524975, 839960, 913000, 954500, 1049950, 1909000, 2099900, 2624875, 4199800, 5249750, 10499500, 20999000]

約数ペア:

[(1, 20999000), (2, 10499500), (4, 5249750), (5, 4199800), (8, 2624875), (10, 2099900), (11, 1909000), (20, 1049950), (22, 954500), (23, 913000), (25, 839960), (40, 524975), (44, 477250), (46, 456500), (50, 419980), (55, 381800), (83, 253000), (88, 238625), (92, 228250), (100, 209990), (110, 190900), (115, 182600), (125, 167992), (166, 126500), (184, 114125), (200, 104995), (220, 95450), (230, 91300), (250, 83996), (253, 83000), (275, 76360), (332, 63250), (415, 50600), (440, 47725), (460, 45650), (500, 41998), (506, 41500), (550, 38180), (575, 36520), (664, 31625), (830, 25300), (913, 23000), (920, 22825), (1000, 20999), (1012, 20750), (1100, 19090), (1150, 18260), (1265, 16600), (1375, 15272), (1660, 12650), (1826, 11500), (1909, 11000), (2024, 10375), (2075, 10120), (2200, 9545), (2300, 9130), (2530, 8300), (2750, 7636), (2875, 7304), (3320, 6325), (3652, 5750), (3818, 5500), (4150, 5060), (4565, 4600)]