68728520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{389}}^1\times {\mathrm{631}}^1$

素因数の和:1038

約数の個数: 64

約数和(自身を含む): 177465600

約数和(自身を除く): 108737080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 389, 631, 778, 1262, 1556, 1945, 2524, 2723, 3112, 3155, 3890, 4417, 5048, 5446, 6310, 7780, 8834, 10892, 12620, 13615, 15560, 17668, 21784, 22085, 25240, 27230, 35336, 44170, 54460, 88340, 108920, 176680, 245459, 490918, 981836, 1227295, 1718213, 1963672, 2454590, 3436426, 4909180, 6872852, 8591065, 9818360, 13745704, 17182130, 34364260, 68728520]

約数ペア:

[(1, 68728520), (2, 34364260), (4, 17182130), (5, 13745704), (7, 9818360), (8, 8591065), (10, 6872852), (14, 4909180), (20, 3436426), (28, 2454590), (35, 1963672), (40, 1718213), (56, 1227295), (70, 981836), (140, 490918), (280, 245459), (389, 176680), (631, 108920), (778, 88340), (1262, 54460), (1556, 44170), (1945, 35336), (2524, 27230), (2723, 25240), (3112, 22085), (3155, 21784), (3890, 17668), (4417, 15560), (5048, 13615), (5446, 12620), (6310, 10892), (7780, 8834)]