20978048

素因数分解:

$2^7\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1801}}^1$

素因数の和:1835

約数の個数: 64

約数和(自身を含む): 51465120

約数和(自身を除く): 30487072

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 32, 52, 56, 64, 91, 104, 112, 128, 182, 208, 224, 364, 416, 448, 728, 832, 896, 1456, 1664, 1801, 2912, 3602, 5824, 7204, 11648, 12607, 14408, 23413, 25214, 28816, 46826, 50428, 57632, 93652, 100856, 115264, 163891, 187304, 201712, 230528, 327782, 374608, 403424, 655564, 749216, 806848, 1311128, 1498432, 1613696, 2622256, 2996864, 5244512, 10489024, 20978048]

約数ペア:

[(1, 20978048), (2, 10489024), (4, 5244512), (7, 2996864), (8, 2622256), (13, 1613696), (14, 1498432), (16, 1311128), (26, 806848), (28, 749216), (32, 655564), (52, 403424), (56, 374608), (64, 327782), (91, 230528), (104, 201712), (112, 187304), (128, 163891), (182, 115264), (208, 100856), (224, 93652), (364, 57632), (416, 50428), (448, 46826), (728, 28816), (832, 25214), (896, 23413), (1456, 14408), (1664, 12607), (1801, 11648), (2912, 7204), (3602, 5824)]