21511772

素因数分解:

$2^2\times {\mathrm{61}}^1\times {\mathrm{131}}^1\times {\mathrm{673}}^1$

素因数の和:869

約数の個数: 24

約数和(自身を含む): 38612112

約数和(自身を除く): 17100340

約数列:

[1, 2, 4, 61, 122, 131, 244, 262, 524, 673, 1346, 2692, 7991, 15982, 31964, 41053, 82106, 88163, 164212, 176326, 352652, 5377943, 10755886, 21511772]

約数ペア:

[(1, 21511772), (2, 10755886), (4, 5377943), (61, 352652), (122, 176326), (131, 164212), (244, 88163), (262, 82106), (524, 41053), (673, 31964), (1346, 15982), (2692, 7991)]