21248080

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{1997}}^1$

素因数の和:2036

約数の個数: 80

約数和(自身を含む): 59460480

約数和(自身を除く): 38212400

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 35, 38, 40, 56, 70, 76, 80, 95, 112, 133, 140, 152, 190, 266, 280, 304, 380, 532, 560, 665, 760, 1064, 1330, 1520, 1997, 2128, 2660, 3994, 5320, 7988, 9985, 10640, 13979, 15976, 19970, 27958, 31952, 37943, 39940, 55916, 69895, 75886, 79880, 111832, 139790, 151772, 159760, 189715, 223664, 265601, 279580, 303544, 379430, 531202, 559160, 607088, 758860, 1062404, 1118320, 1328005, 1517720, 2124808, 2656010, 3035440, 4249616, 5312020, 10624040, 21248080]

約数ペア:

[(1, 21248080), (2, 10624040), (4, 5312020), (5, 4249616), (7, 3035440), (8, 2656010), (10, 2124808), (14, 1517720), (16, 1328005), (19, 1118320), (20, 1062404), (28, 758860), (35, 607088), (38, 559160), (40, 531202), (56, 379430), (70, 303544), (76, 279580), (80, 265601), (95, 223664), (112, 189715), (133, 159760), (140, 151772), (152, 139790), (190, 111832), (266, 79880), (280, 75886), (304, 69895), (380, 55916), (532, 39940), (560, 37943), (665, 31952), (760, 27958), (1064, 19970), (1330, 15976), (1520, 13979), (1997, 10640), (2128, 9985), (2660, 7988), (3994, 5320)]