19901690

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{1493}}^1$

素因数の和:1574

約数の個数: 32

約数和(自身を含む): 37863936

約数和(自身を除く): 17962246

約数列:

[1, 2, 5, 10, 31, 43, 62, 86, 155, 215, 310, 430, 1333, 1493, 2666, 2986, 6665, 7465, 13330, 14930, 46283, 64199, 92566, 128398, 231415, 320995, 462830, 641990, 1990169, 3980338, 9950845, 19901690]

約数ペア:

[(1, 19901690), (2, 9950845), (5, 3980338), (10, 1990169), (31, 641990), (43, 462830), (62, 320995), (86, 231415), (155, 128398), (215, 92566), (310, 64199), (430, 46283), (1333, 14930), (1493, 13330), (2666, 7465), (2986, 6665)]