21730828

素因数分解:

$2^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{643}}^1$

素因数の和:742

約数の個数: 48

約数和(自身を含む): 46738944

約数和(自身を除く): 25008116

約数列:

[1, 2, 4, 7, 14, 17, 28, 34, 68, 71, 119, 142, 238, 284, 476, 497, 643, 994, 1207, 1286, 1988, 2414, 2572, 4501, 4828, 8449, 9002, 10931, 16898, 18004, 21862, 33796, 43724, 45653, 76517, 91306, 153034, 182612, 306068, 319571, 639142, 776101, 1278284, 1552202, 3104404, 5432707, 10865414, 21730828]

約数ペア:

[(1, 21730828), (2, 10865414), (4, 5432707), (7, 3104404), (14, 1552202), (17, 1278284), (28, 776101), (34, 639142), (68, 319571), (71, 306068), (119, 182612), (142, 153034), (238, 91306), (284, 76517), (476, 45653), (497, 43724), (643, 33796), (994, 21862), (1207, 18004), (1286, 16898), (1988, 10931), (2414, 9002), (2572, 8449), (4501, 4828)]