20403705

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{317}}^1\times {\mathrm{613}}^1$

素因数の和:945

約数の個数: 32

約数和(自身を含む): 37488384

約数和(自身を除く): 17084679

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 317, 613, 951, 1585, 1839, 2219, 3065, 4291, 4755, 6657, 9195, 11095, 12873, 21455, 33285, 64365, 194321, 582963, 971605, 1360247, 2914815, 4080741, 6801235, 20403705]

約数ペア:

[(1, 20403705), (3, 6801235), (5, 4080741), (7, 2914815), (15, 1360247), (21, 971605), (35, 582963), (105, 194321), (317, 64365), (613, 33285), (951, 21455), (1585, 12873), (1839, 11095), (2219, 9195), (3065, 6657), (4291, 4755)]