18729880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{181}}^1\times {\mathrm{199}}^1$

素因数の和:404

約数の個数: 64

約数和(自身を含む): 45864000

約数和(自身を除く): 27134120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 181, 199, 260, 362, 398, 520, 724, 796, 905, 995, 1448, 1592, 1810, 1990, 2353, 2587, 3620, 3980, 4706, 5174, 7240, 7960, 9412, 10348, 11765, 12935, 18824, 20696, 23530, 25870, 36019, 47060, 51740, 72038, 94120, 103480, 144076, 180095, 288152, 360190, 468247, 720380, 936494, 1440760, 1872988, 2341235, 3745976, 4682470, 9364940, 18729880]

約数ペア:

[(1, 18729880), (2, 9364940), (4, 4682470), (5, 3745976), (8, 2341235), (10, 1872988), (13, 1440760), (20, 936494), (26, 720380), (40, 468247), (52, 360190), (65, 288152), (104, 180095), (130, 144076), (181, 103480), (199, 94120), (260, 72038), (362, 51740), (398, 47060), (520, 36019), (724, 25870), (796, 23530), (905, 20696), (995, 18824), (1448, 12935), (1592, 11765), (1810, 10348), (1990, 9412), (2353, 7960), (2587, 7240), (3620, 5174), (3980, 4706)]