20867900

素因数分解:

$2^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{211}}^1$

素因数の和:291

約数の個数: 72

約数和(自身を含む): 48580224

約数和(自身を除く): 27712324

約数列:

[1, 2, 4, 5, 10, 20, 23, 25, 43, 46, 50, 86, 92, 100, 115, 172, 211, 215, 230, 422, 430, 460, 575, 844, 860, 989, 1055, 1075, 1150, 1978, 2110, 2150, 2300, 3956, 4220, 4300, 4853, 4945, 5275, 9073, 9706, 9890, 10550, 18146, 19412, 19780, 21100, 24265, 24725, 36292, 45365, 48530, 49450, 90730, 97060, 98900, 121325, 181460, 208679, 226825, 242650, 417358, 453650, 485300, 834716, 907300, 1043395, 2086790, 4173580, 5216975, 10433950, 20867900]

約数ペア:

[(1, 20867900), (2, 10433950), (4, 5216975), (5, 4173580), (10, 2086790), (20, 1043395), (23, 907300), (25, 834716), (43, 485300), (46, 453650), (50, 417358), (86, 242650), (92, 226825), (100, 208679), (115, 181460), (172, 121325), (211, 98900), (215, 97060), (230, 90730), (422, 49450), (430, 48530), (460, 45365), (575, 36292), (844, 24725), (860, 24265), (989, 21100), (1055, 19780), (1075, 19412), (1150, 18146), (1978, 10550), (2110, 9890), (2150, 9706), (2300, 9073), (3956, 5275), (4220, 4945), (4300, 4853)]