16989860

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{409}}^1$

素因数の和:516

約数の個数: 48

約数和(自身を含む): 37470720

約数和(自身を除く): 20480860

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 67, 124, 134, 155, 268, 310, 335, 409, 620, 670, 818, 1340, 1636, 2045, 2077, 4090, 4154, 8180, 8308, 10385, 12679, 20770, 25358, 27403, 41540, 50716, 54806, 63395, 109612, 126790, 137015, 253580, 274030, 548060, 849493, 1698986, 3397972, 4247465, 8494930, 16989860]

約数ペア:

[(1, 16989860), (2, 8494930), (4, 4247465), (5, 3397972), (10, 1698986), (20, 849493), (31, 548060), (62, 274030), (67, 253580), (124, 137015), (134, 126790), (155, 109612), (268, 63395), (310, 54806), (335, 50716), (409, 41540), (620, 27403), (670, 25358), (818, 20770), (1340, 12679), (1636, 10385), (2045, 8308), (2077, 8180), (4090, 4154)]