21653320

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41641}}^1$

素因数の和:41665

約数の個数: 32

約数和(自身を含む): 52468920

約数和(自身を除く): 30815600

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 41641, 83282, 166564, 208205, 333128, 416410, 541333, 832820, 1082666, 1665640, 2165332, 2706665, 4330664, 5413330, 10826660, 21653320]

約数ペア:

[(1, 21653320), (2, 10826660), (4, 5413330), (5, 4330664), (8, 2706665), (10, 2165332), (13, 1665640), (20, 1082666), (26, 832820), (40, 541333), (52, 416410), (65, 333128), (104, 208205), (130, 166564), (260, 83282), (520, 41641)]