21478250

素因数分解:

$2^1\times 5^3\times {\mathrm{53}}^1\times {\mathrm{1621}}^1$

素因数の和:1691

約数の個数: 32

約数和(自身を含む): 40991184

約数和(自身を除く): 19512934

約数列:

[1, 2, 5, 10, 25, 50, 53, 106, 125, 250, 265, 530, 1325, 1621, 2650, 3242, 6625, 8105, 13250, 16210, 40525, 81050, 85913, 171826, 202625, 405250, 429565, 859130, 2147825, 4295650, 10739125, 21478250]

約数ペア:

[(1, 21478250), (2, 10739125), (5, 4295650), (10, 2147825), (25, 859130), (50, 429565), (53, 405250), (106, 202625), (125, 171826), (250, 85913), (265, 81050), (530, 40525), (1325, 16210), (1621, 13250), (2650, 8105), (3242, 6625)]