21327995

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{151}}^1$

素因数の和:263

約数の個数: 32

約数和(自身を含む): 28957824

約数和(自身を除く): 7629829

約数列:

[1, 5, 13, 41, 53, 65, 151, 205, 265, 533, 689, 755, 1963, 2173, 2665, 3445, 6191, 8003, 9815, 10865, 28249, 30955, 40015, 80483, 104039, 141245, 328123, 402415, 520195, 1640615, 4265599, 21327995]

約数ペア:

[(1, 21327995), (5, 4265599), (13, 1640615), (41, 520195), (53, 402415), (65, 328123), (151, 141245), (205, 104039), (265, 80483), (533, 40015), (689, 30955), (755, 28249), (1963, 10865), (2173, 9815), (2665, 8003), (3445, 6191)]