66400820

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{197}}^1\times {\mathrm{887}}^1$

素因数の和:1112

約数の個数: 48

約数和(自身を含む): 147692160

約数和(自身を除く): 81291340

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 197, 380, 394, 788, 887, 985, 1774, 1970, 3548, 3743, 3940, 4435, 7486, 8870, 14972, 16853, 17740, 18715, 33706, 37430, 67412, 74860, 84265, 168530, 174739, 337060, 349478, 698956, 873695, 1747390, 3320041, 3494780, 6640082, 13280164, 16600205, 33200410, 66400820]

約数ペア:

[(1, 66400820), (2, 33200410), (4, 16600205), (5, 13280164), (10, 6640082), (19, 3494780), (20, 3320041), (38, 1747390), (76, 873695), (95, 698956), (190, 349478), (197, 337060), (380, 174739), (394, 168530), (788, 84265), (887, 74860), (985, 67412), (1774, 37430), (1970, 33706), (3548, 18715), (3743, 17740), (3940, 16853), (4435, 14972), (7486, 8870)]