21000279755

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{389}}^1\times {\mathrm{2011}}^1$

素因数の和:2484

約数の個数: 64

約数和(自身を含む): 31638297600

約数和(自身を除く): 10638017845

約数列:

[1, 5, 7, 13, 35, 59, 65, 91, 295, 389, 413, 455, 767, 1945, 2011, 2065, 2723, 3835, 5057, 5369, 10055, 13615, 14077, 22951, 25285, 26143, 26845, 35399, 70385, 114755, 118649, 130715, 160657, 176995, 183001, 298363, 593245, 782279, 803285, 830543, 915005, 1491815, 1542437, 2088541, 3911395, 4152715, 5475953, 7712185, 10169627, 10442705, 10797059, 27379765, 46154461, 50848135, 53985295, 71187389, 230772305, 323081227, 355936945, 600007993, 1615406135, 3000039965, 4200055951, 21000279755]

約数ペア:

[(1, 21000279755), (5, 4200055951), (7, 3000039965), (13, 1615406135), (35, 600007993), (59, 355936945), (65, 323081227), (91, 230772305), (295, 71187389), (389, 53985295), (413, 50848135), (455, 46154461), (767, 27379765), (1945, 10797059), (2011, 10442705), (2065, 10169627), (2723, 7712185), (3835, 5475953), (5057, 4152715), (5369, 3911395), (10055, 2088541), (13615, 1542437), (14077, 1491815), (22951, 915005), (25285, 830543), (26143, 803285), (26845, 782279), (35399, 593245), (70385, 298363), (114755, 183001), (118649, 176995), (130715, 160657)]