81464800

素因数分解:

$2^5\times 5^2\times {\mathrm{79}}^1\times {\mathrm{1289}}^1$

素因数の和:1388

約数の個数: 72

約数和(自身を含む): 201549600

約数和(自身を除く): 120084800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 79, 80, 100, 158, 160, 200, 316, 395, 400, 632, 790, 800, 1264, 1289, 1580, 1975, 2528, 2578, 3160, 3950, 5156, 6320, 6445, 7900, 10312, 12640, 12890, 15800, 20624, 25780, 31600, 32225, 41248, 51560, 63200, 64450, 101831, 103120, 128900, 203662, 206240, 257800, 407324, 509155, 515600, 814648, 1018310, 1031200, 1629296, 2036620, 2545775, 3258592, 4073240, 5091550, 8146480, 10183100, 16292960, 20366200, 40732400, 81464800]

約数ペア:

[(1, 81464800), (2, 40732400), (4, 20366200), (5, 16292960), (8, 10183100), (10, 8146480), (16, 5091550), (20, 4073240), (25, 3258592), (32, 2545775), (40, 2036620), (50, 1629296), (79, 1031200), (80, 1018310), (100, 814648), (158, 515600), (160, 509155), (200, 407324), (316, 257800), (395, 206240), (400, 203662), (632, 128900), (790, 103120), (800, 101831), (1264, 64450), (1289, 63200), (1580, 51560), (1975, 41248), (2528, 32225), (2578, 31600), (3160, 25780), (3950, 20624), (5156, 15800), (6320, 12890), (6445, 12640), (7900, 10312)]