21488890

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{673}}^1$

素因数の和:814

約数の個数: 32

約数和(自身を含む): 40375296

約数和(自身を除く): 18886406

約数列:

[1, 2, 5, 10, 31, 62, 103, 155, 206, 310, 515, 673, 1030, 1346, 3193, 3365, 6386, 6730, 15965, 20863, 31930, 41726, 69319, 104315, 138638, 208630, 346595, 693190, 2148889, 4297778, 10744445, 21488890]

約数ペア:

[(1, 21488890), (2, 10744445), (5, 4297778), (10, 2148889), (31, 693190), (62, 346595), (103, 208630), (155, 138638), (206, 104315), (310, 69319), (515, 41726), (673, 31930), (1030, 20863), (1346, 15965), (3193, 6730), (3365, 6386)]