19810830

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{643}}^1$

素因数の和:745

約数の個数: 64

約数和(自身を含む): 51932160

約数和(自身を除く): 32121330

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 79, 130, 158, 195, 237, 390, 395, 474, 643, 790, 1027, 1185, 1286, 1929, 2054, 2370, 3081, 3215, 3858, 5135, 6162, 6430, 8359, 9645, 10270, 15405, 16718, 19290, 25077, 30810, 41795, 50154, 50797, 83590, 101594, 125385, 152391, 250770, 253985, 304782, 507970, 660361, 761955, 1320722, 1523910, 1981083, 3301805, 3962166, 6603610, 9905415, 19810830]

約数ペア:

[(1, 19810830), (2, 9905415), (3, 6603610), (5, 3962166), (6, 3301805), (10, 1981083), (13, 1523910), (15, 1320722), (26, 761955), (30, 660361), (39, 507970), (65, 304782), (78, 253985), (79, 250770), (130, 152391), (158, 125385), (195, 101594), (237, 83590), (390, 50797), (395, 50154), (474, 41795), (643, 30810), (790, 25077), (1027, 19290), (1185, 16718), (1286, 15405), (1929, 10270), (2054, 9645), (2370, 8359), (3081, 6430), (3215, 6162), (3858, 5135)]