21210072

素因数分解:

$2^3\times 3^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{433}}^1$

素因数の和:612

約数の個数: 64

約数和(自身を含む): 57600480

約数和(自身を除く): 36390408

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 24, 26, 39, 52, 78, 104, 156, 157, 312, 314, 433, 471, 628, 866, 942, 1256, 1299, 1732, 1884, 2041, 2598, 3464, 3768, 4082, 5196, 5629, 6123, 8164, 10392, 11258, 12246, 16328, 16887, 22516, 24492, 33774, 45032, 48984, 67548, 67981, 135096, 135962, 203943, 271924, 407886, 543848, 815772, 883753, 1631544, 1767506, 2651259, 3535012, 5302518, 7070024, 10605036, 21210072]

約数ペア:

[(1, 21210072), (2, 10605036), (3, 7070024), (4, 5302518), (6, 3535012), (8, 2651259), (12, 1767506), (13, 1631544), (24, 883753), (26, 815772), (39, 543848), (52, 407886), (78, 271924), (104, 203943), (156, 135962), (157, 135096), (312, 67981), (314, 67548), (433, 48984), (471, 45032), (628, 33774), (866, 24492), (942, 22516), (1256, 16887), (1299, 16328), (1732, 12246), (1884, 11258), (2041, 10392), (2598, 8164), (3464, 6123), (3768, 5629), (4082, 5196)]