21995475

素因数分解:

$3^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{311}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 38997504

約数和(自身を除く): 17002029

約数列:

[1, 3, 5, 15, 23, 25, 41, 69, 75, 115, 123, 205, 311, 345, 575, 615, 933, 943, 1025, 1555, 1725, 2829, 3075, 4665, 4715, 7153, 7775, 12751, 14145, 21459, 23325, 23575, 35765, 38253, 63755, 70725, 107295, 178825, 191265, 293273, 318775, 536475, 879819, 956325, 1466365, 4399095, 7331825, 21995475]

約数ペア:

[(1, 21995475), (3, 7331825), (5, 4399095), (15, 1466365), (23, 956325), (25, 879819), (41, 536475), (69, 318775), (75, 293273), (115, 191265), (123, 178825), (205, 107295), (311, 70725), (345, 63755), (575, 38253), (615, 35765), (933, 23575), (943, 23325), (1025, 21459), (1555, 14145), (1725, 12751), (2829, 7775), (3075, 7153), (4665, 4715)]