21997988

素因数分解:

$2^2\times {\mathrm{83}}^1\times {\mathrm{173}}^1\times {\mathrm{383}}^1$

素因数の和:643

約数の個数: 24

約数和(自身を含む): 39287808

約数和(自身を除く): 17289820

約数列:

[1, 2, 4, 83, 166, 173, 332, 346, 383, 692, 766, 1532, 14359, 28718, 31789, 57436, 63578, 66259, 127156, 132518, 265036, 5499497, 10998994, 21997988]

約数ペア:

[(1, 21997988), (2, 10998994), (4, 5499497), (83, 265036), (166, 132518), (173, 127156), (332, 66259), (346, 63578), (383, 57436), (692, 31789), (766, 28718), (1532, 14359)]