21639015

素因数分解:

$3^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1801}}^1$

素因数の和:1904

約数の個数: 32

約数和(自身を含む): 38923200

約数和(自身を除く): 17284185

約数列:

[1, 3, 5, 9, 15, 27, 45, 89, 135, 267, 445, 801, 1335, 1801, 2403, 4005, 5403, 9005, 12015, 16209, 27015, 48627, 81045, 160289, 243135, 480867, 801445, 1442601, 2404335, 4327803, 7213005, 21639015]

約数ペア:

[(1, 21639015), (3, 7213005), (5, 4327803), (9, 2404335), (15, 1442601), (27, 801445), (45, 480867), (89, 243135), (135, 160289), (267, 81045), (445, 48627), (801, 27015), (1335, 16209), (1801, 12015), (2403, 9005), (4005, 5403)]