19771479

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^2\times {\mathrm{619}}^1$

素因数の和:661

約数の個数: 48

約数和(自身を含む): 36307200

約数和(自身を除く): 16535721

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 91, 117, 169, 189, 273, 351, 507, 619, 819, 1183, 1521, 1857, 2457, 3549, 4333, 4563, 5571, 8047, 10647, 12999, 16713, 24141, 31941, 38997, 56329, 72423, 104611, 116991, 168987, 217269, 313833, 506961, 732277, 941499, 1520883, 2196831, 2824497, 6590493, 19771479]

約数ペア:

[(1, 19771479), (3, 6590493), (7, 2824497), (9, 2196831), (13, 1520883), (21, 941499), (27, 732277), (39, 506961), (63, 313833), (91, 217269), (117, 168987), (169, 116991), (189, 104611), (273, 72423), (351, 56329), (507, 38997), (619, 31941), (819, 24141), (1183, 16713), (1521, 12999), (1857, 10647), (2457, 8047), (3549, 5571), (4333, 4563)]