21980091

素因数分解:

$3^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{13249}}^1$

素因数の和:13338

約数の個数: 16

約数和(自身を含む): 33920000

約数和(自身を除く): 11939909

約数列:

[1, 3, 7, 21, 79, 237, 553, 1659, 13249, 39747, 92743, 278229, 1046671, 3140013, 7326697, 21980091]

約数ペア:

[(1, 21980091), (3, 7326697), (7, 3140013), (21, 1046671), (79, 278229), (237, 92743), (553, 39747), (1659, 13249)]