21641505

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{149}}^1\times {\mathrm{421}}^1$

素因数の和:601

約数の個数: 32

約数和(自身を含む): 36460800

約数和(自身を除く): 14819295

約数列:

[1, 3, 5, 15, 23, 69, 115, 149, 345, 421, 447, 745, 1263, 2105, 2235, 3427, 6315, 9683, 10281, 17135, 29049, 48415, 51405, 62729, 145245, 188187, 313645, 940935, 1442767, 4328301, 7213835, 21641505]

約数ペア:

[(1, 21641505), (3, 7213835), (5, 4328301), (15, 1442767), (23, 940935), (69, 313645), (115, 188187), (149, 145245), (345, 62729), (421, 51405), (447, 48415), (745, 29049), (1263, 17135), (2105, 10281), (2235, 9683), (3427, 6315)]