31812820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{3947}}^1$

素因数の和:4000

約数の個数: 48

約数和(自身を含む): 74285568

約数和(自身を除く): 42472748

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 260, 310, 403, 620, 806, 1612, 2015, 3947, 4030, 7894, 8060, 15788, 19735, 39470, 51311, 78940, 102622, 122357, 205244, 244714, 256555, 489428, 513110, 611785, 1026220, 1223570, 1590641, 2447140, 3181282, 6362564, 7953205, 15906410, 31812820]

約数ペア:

[(1, 31812820), (2, 15906410), (4, 7953205), (5, 6362564), (10, 3181282), (13, 2447140), (20, 1590641), (26, 1223570), (31, 1026220), (52, 611785), (62, 513110), (65, 489428), (124, 256555), (130, 244714), (155, 205244), (260, 122357), (310, 102622), (403, 78940), (620, 51311), (806, 39470), (1612, 19735), (2015, 15788), (3947, 8060), (4030, 7894)]