21378500

素因数分解:

$2^2\times 5^3\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1$

素因数の和:79

約数の個数: 144

約数和(自身を含む): 57552768

約数和(自身を除く): 36174268

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 23, 25, 26, 44, 46, 50, 52, 55, 65, 92, 100, 110, 115, 125, 130, 143, 169, 220, 230, 250, 253, 260, 275, 286, 299, 325, 338, 460, 500, 506, 550, 572, 575, 598, 650, 676, 715, 845, 1012, 1100, 1150, 1196, 1265, 1300, 1375, 1430, 1495, 1625, 1690, 1859, 2300, 2530, 2750, 2860, 2875, 2990, 3250, 3289, 3380, 3575, 3718, 3887, 4225, 5060, 5500, 5750, 5980, 6325, 6500, 6578, 7150, 7436, 7475, 7774, 8450, 9295, 11500, 12650, 13156, 14300, 14950, 15548, 16445, 16900, 17875, 18590, 19435, 21125, 25300, 29900, 31625, 32890, 35750, 37180, 37375, 38870, 42250, 42757, 46475, 63250, 65780, 71500, 74750, 77740, 82225, 84500, 85514, 92950, 97175, 126500, 149500, 164450, 171028, 185900, 194350, 213785, 232375, 328900, 388700, 411125, 427570, 464750, 485875, 822250, 855140, 929500, 971750, 1068925, 1644500, 1943500, 2137850, 4275700, 5344625, 10689250, 21378500]

約数ペア:

[(1, 21378500), (2, 10689250), (4, 5344625), (5, 4275700), (10, 2137850), (11, 1943500), (13, 1644500), (20, 1068925), (22, 971750), (23, 929500), (25, 855140), (26, 822250), (44, 485875), (46, 464750), (50, 427570), (52, 411125), (55, 388700), (65, 328900), (92, 232375), (100, 213785), (110, 194350), (115, 185900), (125, 171028), (130, 164450), (143, 149500), (169, 126500), (220, 97175), (230, 92950), (250, 85514), (253, 84500), (260, 82225), (275, 77740), (286, 74750), (299, 71500), (325, 65780), (338, 63250), (460, 46475), (500, 42757), (506, 42250), (550, 38870), (572, 37375), (575, 37180), (598, 35750), (650, 32890), (676, 31625), (715, 29900), (845, 25300), (1012, 21125), (1100, 19435), (1150, 18590), (1196, 17875), (1265, 16900), (1300, 16445), (1375, 15548), (1430, 14950), (1495, 14300), (1625, 13156), (1690, 12650), (1859, 11500), (2300, 9295), (2530, 8450), (2750, 7774), (2860, 7475), (2875, 7436), (2990, 7150), (3250, 6578), (3289, 6500), (3380, 6325), (3575, 5980), (3718, 5750), (3887, 5500), (4225, 5060)]