20430980

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{79}}^1\times {\mathrm{193}}^1$

素因数の和:348

約数の個数: 48

約数和(自身を含む): 44325120

約数和(自身を除く): 23894140

約数列:

[1, 2, 4, 5, 10, 20, 67, 79, 134, 158, 193, 268, 316, 335, 386, 395, 670, 772, 790, 965, 1340, 1580, 1930, 3860, 5293, 10586, 12931, 15247, 21172, 25862, 26465, 30494, 51724, 52930, 60988, 64655, 76235, 105860, 129310, 152470, 258620, 304940, 1021549, 2043098, 4086196, 5107745, 10215490, 20430980]

約数ペア:

[(1, 20430980), (2, 10215490), (4, 5107745), (5, 4086196), (10, 2043098), (20, 1021549), (67, 304940), (79, 258620), (134, 152470), (158, 129310), (193, 105860), (268, 76235), (316, 64655), (335, 60988), (386, 52930), (395, 51724), (670, 30494), (772, 26465), (790, 25862), (965, 21172), (1340, 15247), (1580, 12931), (1930, 10586), (3860, 5293)]