19991608

素因数分解:

$2^3\times 7^2\times {\mathrm{13}}^1\times {\mathrm{3923}}^1$

素因数の和:3956

約数の個数: 48

約数和(自身を含む): 46970280

約数和(自身を除く): 26978672

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 49, 52, 56, 91, 98, 104, 182, 196, 364, 392, 637, 728, 1274, 2548, 3923, 5096, 7846, 15692, 27461, 31384, 50999, 54922, 101998, 109844, 192227, 203996, 219688, 356993, 384454, 407992, 713986, 768908, 1427972, 1537816, 2498951, 2855944, 4997902, 9995804, 19991608]

約数ペア:

[(1, 19991608), (2, 9995804), (4, 4997902), (7, 2855944), (8, 2498951), (13, 1537816), (14, 1427972), (26, 768908), (28, 713986), (49, 407992), (52, 384454), (56, 356993), (91, 219688), (98, 203996), (104, 192227), (182, 109844), (196, 101998), (364, 54922), (392, 50999), (637, 31384), (728, 27461), (1274, 15692), (2548, 7846), (3923, 5096)]