21981663

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{353}}^1$

素因数の和:424

約数の個数: 48

約数和(自身を含む): 37773216

約数和(自身を除く): 15791553

約数列:

[1, 3, 9, 11, 17, 33, 37, 51, 99, 111, 153, 187, 333, 353, 407, 561, 629, 1059, 1221, 1683, 1887, 3177, 3663, 3883, 5661, 6001, 6919, 11649, 13061, 18003, 20757, 34947, 39183, 54009, 62271, 66011, 117549, 143671, 198033, 222037, 431013, 594099, 666111, 1293039, 1998333, 2442407, 7327221, 21981663]

約数ペア:

[(1, 21981663), (3, 7327221), (9, 2442407), (11, 1998333), (17, 1293039), (33, 666111), (37, 594099), (51, 431013), (99, 222037), (111, 198033), (153, 143671), (187, 117549), (333, 66011), (353, 62271), (407, 54009), (561, 39183), (629, 34947), (1059, 20757), (1221, 18003), (1683, 13061), (1887, 11649), (3177, 6919), (3663, 6001), (3883, 5661)]