64458400

素因数分解:

$2^5\times 5^2\times {\mathrm{197}}^1\times {\mathrm{409}}^1$

素因数の和:626

約数の個数: 72

約数和(自身を含む): 158544540

約数和(自身を除く): 94086140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 160, 197, 200, 394, 400, 409, 788, 800, 818, 985, 1576, 1636, 1970, 2045, 3152, 3272, 3940, 4090, 4925, 6304, 6544, 7880, 8180, 9850, 10225, 13088, 15760, 16360, 19700, 20450, 31520, 32720, 39400, 40900, 65440, 78800, 80573, 81800, 157600, 161146, 163600, 322292, 327200, 402865, 644584, 805730, 1289168, 1611460, 2014325, 2578336, 3222920, 4028650, 6445840, 8057300, 12891680, 16114600, 32229200, 64458400]

約数ペア:

[(1, 64458400), (2, 32229200), (4, 16114600), (5, 12891680), (8, 8057300), (10, 6445840), (16, 4028650), (20, 3222920), (25, 2578336), (32, 2014325), (40, 1611460), (50, 1289168), (80, 805730), (100, 644584), (160, 402865), (197, 327200), (200, 322292), (394, 163600), (400, 161146), (409, 157600), (788, 81800), (800, 80573), (818, 78800), (985, 65440), (1576, 40900), (1636, 39400), (1970, 32720), (2045, 31520), (3152, 20450), (3272, 19700), (3940, 16360), (4090, 15760), (4925, 13088), (6304, 10225), (6544, 9850), (7880, 8180)]