21780980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{83773}}^1$

素因数の和:83795

約数の個数: 24

約数和(自身を含む): 49259112

約数和(自身を除く): 27478132

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 83773, 167546, 335092, 418865, 837730, 1089049, 1675460, 2178098, 4356196, 5445245, 10890490, 21780980]

約数ペア:

[(1, 21780980), (2, 10890490), (4, 5445245), (5, 4356196), (10, 2178098), (13, 1675460), (20, 1089049), (26, 837730), (52, 418865), (65, 335092), (130, 167546), (260, 83773)]