64728020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{257}}^2$

素因数の和:537

約数の個数: 54

約数和(自身を含む): 158738958

約数和(自身を除く): 94010938

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 257, 490, 514, 980, 1028, 1285, 1799, 2570, 3598, 5140, 7196, 8995, 12593, 17990, 25186, 35980, 50372, 62965, 66049, 125930, 132098, 251860, 264196, 330245, 462343, 660490, 924686, 1320980, 1849372, 2311715, 3236401, 4623430, 6472802, 9246860, 12945604, 16182005, 32364010, 64728020]

約数ペア:

[(1, 64728020), (2, 32364010), (4, 16182005), (5, 12945604), (7, 9246860), (10, 6472802), (14, 4623430), (20, 3236401), (28, 2311715), (35, 1849372), (49, 1320980), (70, 924686), (98, 660490), (140, 462343), (196, 330245), (245, 264196), (257, 251860), (490, 132098), (514, 125930), (980, 66049), (1028, 62965), (1285, 50372), (1799, 35980), (2570, 25186), (3598, 17990), (5140, 12593), (7196, 8995)]