721409140

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{251}}^1\times {\mathrm{1097}}^1$

素因数の和:1488

約数の個数: 48

約数和(自身を含む): 1534002624

約数和(自身を除く): 812593484

約数列:

[1, 2, 4, 5, 10, 20, 131, 251, 262, 502, 524, 655, 1004, 1097, 1255, 1310, 2194, 2510, 2620, 4388, 5020, 5485, 10970, 21940, 32881, 65762, 131524, 143707, 164405, 275347, 287414, 328810, 550694, 574828, 657620, 718535, 1101388, 1376735, 1437070, 2753470, 2874140, 5506940, 36070457, 72140914, 144281828, 180352285, 360704570, 721409140]

約数ペア:

[(1, 721409140), (2, 360704570), (4, 180352285), (5, 144281828), (10, 72140914), (20, 36070457), (131, 5506940), (251, 2874140), (262, 2753470), (502, 1437070), (524, 1376735), (655, 1101388), (1004, 718535), (1097, 657620), (1255, 574828), (1310, 550694), (2194, 328810), (2510, 287414), (2620, 275347), (4388, 164405), (5020, 143707), (5485, 131524), (10970, 65762), (21940, 32881)]