21779420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{211}}^1\times {\mathrm{397}}^1$

素因数の和:630

約数の個数: 48

約数和(自身を含む): 49613088

約数和(自身を除く): 27833668

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 211, 260, 397, 422, 794, 844, 1055, 1588, 1985, 2110, 2743, 3970, 4220, 5161, 5486, 7940, 10322, 10972, 13715, 20644, 25805, 27430, 51610, 54860, 83767, 103220, 167534, 335068, 418835, 837670, 1088971, 1675340, 2177942, 4355884, 5444855, 10889710, 21779420]

約数ペア:

[(1, 21779420), (2, 10889710), (4, 5444855), (5, 4355884), (10, 2177942), (13, 1675340), (20, 1088971), (26, 837670), (52, 418835), (65, 335068), (130, 167534), (211, 103220), (260, 83767), (397, 54860), (422, 51610), (794, 27430), (844, 25805), (1055, 20644), (1588, 13715), (1985, 10972), (2110, 10322), (2743, 7940), (3970, 5486), (4220, 5161)]