388490980

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{148279}}^1$

素因数の和:148419

約数の個数: 24

約数和(自身を含む): 822064320

約数和(自身を除く): 433573340

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 655, 1310, 2620, 148279, 296558, 593116, 741395, 1482790, 2965580, 19424549, 38849098, 77698196, 97122745, 194245490, 388490980]

約数ペア:

[(1, 388490980), (2, 194245490), (4, 97122745), (5, 77698196), (10, 38849098), (20, 19424549), (131, 2965580), (262, 1482790), (524, 741395), (655, 593116), (1310, 296558), (2620, 148279)]