21430708

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{199}}^1$

素因数の和:344

約数の個数: 48

約数和(自身を含む): 43120000

約数和(自身を除く): 21689292

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 76, 109, 199, 218, 247, 398, 436, 494, 796, 988, 1417, 2071, 2587, 2834, 3781, 4142, 5174, 5668, 7562, 8284, 10348, 15124, 21691, 26923, 43382, 49153, 53846, 86764, 98306, 107692, 196612, 281983, 412129, 563966, 824258, 1127932, 1648516, 5357677, 10715354, 21430708]

約数ペア:

[(1, 21430708), (2, 10715354), (4, 5357677), (13, 1648516), (19, 1127932), (26, 824258), (38, 563966), (52, 412129), (76, 281983), (109, 196612), (199, 107692), (218, 98306), (247, 86764), (398, 53846), (436, 49153), (494, 43382), (796, 26923), (988, 21691), (1417, 15124), (2071, 10348), (2587, 8284), (2834, 7562), (3781, 5668), (4142, 5174)]